My friend used the push method on his guardian to beat it, so I was determined to solo it just like he did. Problem is, I'm a Sentinel. I used the strategies here. Every time I popped out I would use all my burn effects then fight him until I was out of interrupts and run behind a pillar. My attempts were much better when T7 lived to the second set of adds. Basically, your job is to survive through 3 sets of adds. If you can do that, you can finish the fight, albeit slowly. 1st set of adds: let T7 take them and kill them as fast as possible. I just used strike to kill them. The tab targeting seemed really wonky. 2nd set: T7 will probably die pretty early. His job here is to group them up before he dies so yo ucan awe and finish them off. 3rd set: Use Force Camo to get 2 or 3 of the adds down, then pop your other defensive CDs for the rest. From there, just use los and only pop your head out to attack when you have at least 2 interrupts available (I was watchmen spec, so force leap is down to 0 range and can interrupt). In between interrupts, just try to use as many burns as possible. I tried to save guarded by the force as a last resort. I was at less than 5% health when I got him. It required a bit of luck with his casting (if he force storms during that initial group of adds, t7 is dead). I used the vendor medpacs and an endurance stim for a little extra health. Took me about 9 tries to get the strategy down well and 3 more tries to get lucky enough with his casting choices that it was doable (for example, he never used his super-insta-death attack while I was in los). I ended up only getting hit with a few lightning blasts.