But yeah, if you're starting heroics you should be able to 2 heal Jin'rokh/Horridon/Tortos/Ji-Kun without any major issues.
Try Tortos next, DK is so strong on the encounter...
- just 2 heal it, the DK is nearly healing himself alone because blood shield is taken before the crystal shell...
- let the Monk kite the bats... (incredible its still so easy working)
- get down the turtles fast so you can use them to have high uptime on tortos but allways have 1 or 2 for safe kicks
--> Freeloot boss with blood dk and bm monk
Theoretically a lot of bosses can be 2 healed. Practically it's very hard to do that during progress, because you obviously have more fails during progress tries and more fails means more heal.
Especially if your gear isn't that good (which I assume it is when you are about starting ToT HMs). Jin Rokh sadly isn't as easy as it sounds. The lightning strike phase can really be a pain in the ass. Especially with only two healers. Sometimes you just can't avoid all the lightnings and some of your raid members will take damage. Doing the phase with two healers can be really tough. Especially if two healers have to run. It's doable but I would not recommend it as you will have 3 lightning phases on your first kill.
Horridon is totally doable. Just focus the correct adds and dispell till your fingers bleed.
Council is very hard with two healers. We just killed it once last ID and for our group it would be very hard to 2 heal it. There are times in this fight (hello Kazra'jin) where there is massive AoE damage going on.
Tortos is also doable. You definitely want to go 2 healers here, otherwise the damage for the bats/turtles will be a little low.
Megaera I have no idea, we didn't kill it right now, but I assume it will be tough. It was tough on normal, too.
Ji Kun. We do it with 3 healers and the platform tactic. I assume that it is possible, though maybe a bit sketchy on the main platform, because you always need a healer on the egg platforms.
Durumu. Think it's 2 healable, but we didn't try it yet.
Primordius. This one is supposed to be easier with 3. Currently progressing on it
Dark Animus. Weird Boss.
Iron Qon. We 3 heal it with one tank. Damage in phase 1 and the phase with all dogs up is rough. Otherwise it may be possible.
Twin Consorts. We tried to 2 heal it and it could work if you send a DD to draw. We afterwards 3 healed it and it was pretty much a push over with the 3rd healer drawing.
Lei Shen. I assume you will want to have 3 healers here.
Don't have flashy experience with all the HC encounters this tier.
But for progression we've 3 healed Jin'rokh, Ji-kun, Iron Qon
For Horridon, Tortos we used 2 healers for progression.
Now that we have Jin'rokh on farm aka people know what to do, have better gear, know how to avoid dmg, etc. It is very easy to 2 heal.
Due to lack of healers last night we 2-healed Ji-kun. Was bit touch and go, but nothing too hard. FYI reflction
You need healer only for 2, 4, 6, 8 platforms, as then it is when Quills happen. For the uneven platforms you do not need a healer and can send 3 DPS instead. Since your one group will be on 6th plat. w/o a healer, they need to get the nest cleared before Quills and come down to middle plat for heals.Ji Kun. We do it with 3 healers and the platform tactic. I assume that it is possible, though maybe a bit sketchy on the main platform, because you always need a healer on the egg platforms.
Avoid 2 healing the following bosses untill you vastly overgear the content ~540+: Council, Mageara(this one has absolutely no reason to be 2 healed unless healers wana show off!!), primordius.
Durumu is easier with 2 healers, lei shen as well. 3 Healing ra-den is 100% kill when u hit phase 2.