I'm always amused by the arguement of 'ideal' classes for the job.
My experience, from the 100 odd wipes I had with dilih before the servers decided to regularly boot me was this:
It's not about the class it's about the player.
Asa was there on our 6% wipe... as dps. So dont tell me sorc dps doesn't cut it because he doesn't have enough. He had plenty. Not to mention the fact that sorcs can bubble doom. So you dont even have to STOP dpsing when you get it (unlike marauders, juggys, mercs, operatives, sins etc). Snipers are the same deal. You call them fotm, i call them convenient composition.
And while everyone is hating on Lace's juggy dps I dont think i should have to point out the sheer skill he has as a player greatly outweighs the fact that his class is percieved as 'not optimal dps'.
There is so much positioning, repositioning, running for your life, popping defensive cooldowns and having minor heart attacks every 2s in that fight that your dummy parses mean completely f-a. If you asked Syrra how often he got a full merc rotation off before having to move i bet he could probably count them on his fingers. And i imagine if you asked Maloney and Emi the amount of times they had series of shots or whatever other snipery stuff is required (you can tell my sniper is not 55 huh) interrupted by the necessity to roll or move they'd run out of fingers and toes.
If you've made the effort with gearing up your raid group you will clear this. With dedication, time, and understanding of the fight, no matter who you put in there. It took us 2 days to reliably reach p3. And even then half the time it felt like luck of the draw. If you cant accept the fact that sometimes you are going to get unlucky and wipe... or that the fight will take dedication and the ultimate concentration on -every- raid member's behalf the I wouldn't recommend hitting your head on the wall repeatedly. (You're just losing brain cells for no reason).