So, I have been looking for more in-depth info on expertise but all I can find are either outdated or too obscure for me.

So, what happens when Player1 has 1200 expertise and Player2 has (say) 1350 expertise?

Is it as if Player 2 has 150 expertise and Player1 has none?

I simply can't find out whether the difference between 1200 expertise and 1350 expertise is significant or nearly meaningless. I can see on an old graph that the difference is numerically small, some 22.8% vs 23.5% or something like that for damage boost but are there other "hidden" factors that one should be aware of?

Any info on this or a link to a good general (and up to date) info on expertise would be nice.

click the PVP option in your character sheet. It tells you your current % differences for defense healing etc based on your expertise

That is why when you hit 50 and you see a drop in stats but a major boost in expertise USING recruit gear you should take it. If I see another person in the game without 800+ expertise I just plan on dropping. They obviously could care less about the match.

According to this http://mmo-mechanics.com/swtor/forums/thread-364.html thread the amount of increase/reduction can be calculated as follows:

PvP Damage Boost = 50% * ( 1 - ( 1 - ( 0.01 / 0.5 ) )^( ( ( Expertise ) / max(Level,20) ) / 0.8 ) )

PvP Damage Reduction = 1 - 1 / ( 1 + PvPDamageBoost )

PvP Healing Boost = 30% * ( 1 - ( 1 - ( 0.01 / 0.3 ) )^( ( Expertise / max(Level,20) ) / 1.5 ) )

That means, the more Expertise you have, the less the same difference will impact both players. If you draw a graph using Excel you can see that the more expertise you have, the less the absolute reduction gain will be. At 0 Expertise you gain 1,25% damage increase for the first 50 points in Expertise. At 1000 Expertise you only gain 0,75% damage increase for 50 points in Expertise... After 1250 Expertise the increase doesn't really outweigh the increase you get from other stats usually...

Expertise	Damage	Delta
0		0,00%	0%
50		1,25%	1,25%
100		2,46%	1,22%
150		3,65%	1,19%
200		4,80%	1,16%
250		5,93%	1,13%
300		7,03%	1,10%
350		8,10%	1,07%
400		9,15%	1,04%
450		10,17%	1,02%
500		11,16%	0,99%
550		12,13%	0,97%
600		13,07%	0,94%
650		13,99%	0,92%
700		14,89%	0,90%
750		15,77%	0,88%
800		16,62%	0,85%
850		17,45%	0,83%
900		18,26%	0,81%
950		19,06%	0,79%
1000	19,83%	0,77%
1050	20,58%	0,75%
1100		21,31%	0,73%
1150		22,03%	0,72%
1200	22,73%	0,70%
1250	23,41%	0,68%
1300	24,07%	0,66%
1350	24,72%	0,65%
1400	25,35%	0,63%
1450	25,96%	0,61%
1500	26,56%	0,60%

So, I have been looking for more in-depth info on expertise but all I can find are either outdated or too obscure for me.

 

So, what happens when Player1 has 1200 expertise and Player2 has (say) 1350 expertise?

 

Is it as if Player 2 has 150 expertise and Player1 has none?

 

I simply can't find out whether the difference between 1200 expertise and 1350 expertise is significant or nearly meaningless. I can see on an old graph that the difference is numerically small, some 22.8% vs 23.5% or something like that for damage boost but are there other "hidden" factors that one should be aware of?

 

Any info on this or a link to a good general (and up to date) info on expertise would be nice.

pretty sure it basically goes like this for pvp damage and pvp damage reduction... the stats you see on your PVP tab are what your bonuses would be vs a 0 exp player. if both players have the same exp, it cancels out and neither player gets bonus damage or damage reduction.

so for what you want to know, remove all your gear, then just add enough gear so you have 150 exp. now look at the PVP stats 150 exp gives. that will be what the advantage player2 has from your question.

Has it not been changed since the above formula?

Damage is very high now, per pt of expertise. Dmg reduction is ok and healing bonus is crap,

Has it not been changed since the above formula?

 

Damage is very high now, per pt of expertise. Dmg reduction is ok and healing bonus is crap,

You noticed there are three different formulas? I've got 1222 expertise atm on my operative and if I calculate the values via the formula that corresponds to the %-values displayed in game.

ive heard a rumor that expertise reduces dmg taken from other players..

oddly though i still get crit for 6 and 7k by lolsmashes and eat chain 5k crits from loltechs

so i cannot confirm this

Has it not been changed since the above formula?

 

Damage is very high now, per pt of expertise. Dmg reduction is ok and healing bonus is crap,

This has been gone over before. Damage Increase and Damage Reduction cancel each other out with Expertise. If both players have an equal amount of it, there is no increased damage whatsoever, due to Expertise.

The healing bonus is the only thing unaffected by this, making healers always gain an Healing Increase with Expertise. We can argue all day whether or not that increase is sufficient.

Edited my first post because the expertise calculations are not linear so an analogy would not work.

Anyways.. Just curious on the damage increase negating if both players have the same expertise

This has been gone over before. Damage Increase and Damage Reduction cancel each other out with Expertise. If both players have an equal amount of it, there is no increased damage whatsoever, due to Expertise.

So with 1282 expertise one of my characters has:

Damage increase 23.83%

Damage Reduction 19.25

Healing 13.19%

If two people with the same 1282 expertise are fighting each other I can see how the percent will cancel out in the long run if they are doing the same dps... BUT lets say one is just taking damage from the other player.

How can a 23.83% damage increase be negated by a 19.25 damage reduction...

How can a 23.83% damage increase be negated by a 19.25 damage reduction...

Simple...

Real Damage = Base Damage * ( 1 + Increase in Percent) * (1 - Decrease in Percent)

Real Damage = Base Damage * 1.2383 * 0.8075.

If you calculate 1.2383 * 0.8075 you will get roughly 1.0000. (Because of rounding errors...)

This can be explained rather simple if you solve the formula:

Real Damage = Base Damage * (1 + PvPDamBonus) * (1 - (1 - 1/(+PvPDamBonus)))

PvP Damage Bonus

PvP Damage Reduction

Just multiply out...

Real Damage = Base Damage *((1 + PvPDamBonus) - (1 + PvPDamBonus) + PvPDamBonus)/(+PvPDamBonus))

So now you can drag together within the brackets... (1+PvPDamBonus) - (1+PvPDamBonus) = 0.

Real Damage = Base Damage * (0 + (1 + PvPDamBonus)/(1 + PvPDamBonus))

Now (1 + PvPDamBonus)/(1 + PvPDamBonus) for sure equals 1. So...

Real Damage = Base Damage * 1

or in other words:

Real Damage = Base Damage.

This has been gone over before. Damage Increase and Damage Reduction cancel each other out with Expertise. If both players have an equal amount of it, there is no increased damage whatsoever, due to Expertise.

 

The healing bonus is the only thing unaffected by this, making healers always gain an Healing Increase with Expertise. We can argue all day whether or not that increase is sufficient.

This.

The healing bonus directly reduces the 30% trauma that's inflicting by default the moment you enter a warzone or pvp combat.

What you gain in DPS output (by reducing expertise for pve 27 items) is counterbalanced by your own survivability (especially considering incoming heals).

What you are comfortable with is an individual thing, but there's no 'cap' anywhere. it's all about how much you want to take from one pool and give to the other pool.