I stopped recording other things than chapters after KOTET and deleted all HM flashpoint solo videos I had.
Tips for Caller In the Dark, stack up in front of the mining carts so you don't get pushed back when he uses obliterate and have everyone use some kind of cooldown for it. This way a healer can easily keep the group up with AOE heals. Adds will come 3 times max, focus on them when that happens. If a companion healer can keep me up then a player should have no trouble doing the same.