I appreciate your graphic OP, very well put. Allow my to offer an alternative solution.
You're a guardian not melee dps. Drop guard on a healer or a ranged or anyone really that's getting focused by more than one enemy. taunt the **** out of the enemy melee so they do less damage to your friends, and you get valor at the same time. Use your AoE slow with impunity so your melee can stick and move.
I know we all want to get kills, but this game is kind enough to reward the above actions in warzones, so I do it. There's been plenty of times where I'm one of only 2 people with any protection rating in a warzone, and that seems silly. It's a team game, remember remember.
That's my 2 cents. Keep in mind my highest character is only a 26 Sith Warrior so I am by no means an expert, these are my observations thus far.