los issues with the healer? i get that a lot, if you get hit and get knocked into the water when i'm still on the island, you'll be out of los. which doesn't make any sense but it's just how it works.
hunters are good at handling adds, traps can be put down before the adds get to their spot, then one of the adds will be frozen right after it arrives.
the ranged adds has 24k health, should be easy to kill within a matter of seconds. even the melee adds only have 60k ish health, just think of one of those forge-destroyers in heroic mech, with twice the dps you can get from a 5-man, those things should go down quickly.
Chinatown's guild does not sheep any of the adds, they burst down the 2 ranged adds in about 10 seconds then kill all melee adds with focused fire.
strategy is dependent on the raid, if our ccers are having trouble doing their job, then having a tank to do it for them instead might be better, listen to people from another guild helps, but we don't have their raid composition, so it might not work for us. for example: if we try to keep melee add sheeped, and our mage was under water during a spout while the sheep pops, it is pretty much a guaranteed wipe.
PvE content in this entire game is a simple "follow the instructions" game, i don't use a boss mod unless some of the timers are really important. for fights like void reaver, lurker, and entire karazhan, i turn my boss mod off, and i do just fine. in the end, finding what suit our style best is what makes a raid work. i sometimes run in a circle for spout too when i feel like it, since it allows me to reach everyone who was getting hit, and as long as i survive and i'm doing my job, i don't see what's wrong with it. most of our death comes from the 3 melee adds, so our focus right now should be on how to best control these 3 guys with our raid composition. I've seen goodwone picking up the add the moment they are available for hostile action, so having tanks tanking them should work for us too. I do notice i sometimes get shot from the ranged adds. the island people needs to do a better job at CC, fear is good, but it breaks fast. sheep/trap is better, and having 1 of those on each island knowing exactly when/where the ranged add spawns so the entire island can have a focus fire order may be better.