"I have just realized that I didn't upload any video from Tiamat's Hidden Space / Dragon Lord's Refuge yet. We just started going again there after long break. It still looks harder than Makarna or any other instance in Aion.

Group1 (Tank)
- support cleric
- support cleric
- support chanter
- SM
- dps templar
- tanking templar

Group2 (DPS):
- support cleric
- support chanter
- dps templar
- gladiator
- gladiator
- assassin

Few tips:
1. Basically You need 3 support clerics, 2 supports chanters to keep people alive. You can take also bard with Melody of Joy for extra HP buff or SM to increase physical DPS with SWOP.
2. I don't recommend taking any other magical DPS. Look like Tiamat has high amount of elemental defence. Also templars / glads are more tough and it's much easier to keep them alive.
3. Hard version of instance is a little bit different than old one. There is no paralyze/stun at all, so You don't stop at 25% before adds spawn to avoid too early paralyze/stun. Just go full DPS from 50% to 0.
4. Tiamat is dealing dmg on all map, so tanking adds away from boss doesn't help any more. It's better if u have just 1 tank for adds and he stay in range of healers (just run from left to right).
5. Healers should move away if they see adds close to them and give a little bit time for templar to get aggro.
6. Don't save big cool downs, it's better to use it earlier and keep everyone as long as possible.
7. Everyone should deal dmg on boss from 50% until first AoE dmg. Even support clerics and chanters should dpsing Tiamat until they see first big dmg coming from boss. Then instantly switch for support set and keep healing until the end.
8 . The best set for healers is HP+MR composite set. You can resist only hits from mobs. So if You don't have this set, stay on full HP."