I honestly think the level 55 hm flashpoints are too easy. I'm in dread guard gear and it's not even a challenge with any of the groups I've been with.

I joined a group that did this and we all got the 5 BH comms for it.

Found a group in about 5 minutes using group finder. We got through EV in about 40 minutes.

To those who say it takes too long: It does take a while to learn the mechanics, but once you get those down it's just like any other flashpoint. The group I go with finished it in 45 minutes with zero deaths.

I was in a group that killed first boss in HM with 1 ranged, 1 tank, 1 healer, 1 melee (me) and we didn't have too much of a problem. I was the only one interrupting (incinerate, obviously).

We did this HM with 1 operative (healer), 2 assassins (1 melee dps, 1 tank), and 1 mercenary (ranged dps). LR-5 (first boss) was definitely the hardest of all of the bosses in the instance, and the last boss was the easiest (for us at least). We wiped 7 or 8 times before getting the first boss down and wiped 2 times on the 2nd boss. It took 3 tries for the bonus boss and it took only 2 tries for the last boss. What we did for LR-5 was have the tank first get him to the right corner, then move in a counter-clockwise direction when the bubbles appear (we waited for 2 before moving). The healer and melee dps (me) followed the tank closely and the ranged dps stayed as far away from us as possible. If you pace yourself, you will make it. Do not rush! Also, interrupt every incinerate. We used our relics/cd's at the beginning of the fight and when he hit ~20% and we were able to take him out quite fast. We were all full Columi with maybe 1 or 2 Rakata pieces.