Thms strength is easily Dots, they are devastating on NMs between conjs elemental dots and thurms dots (can do both on thm easy) you are looking at 100s of dmg a tick of Dot. Making Thm honestly deal more dmg then most the dds over time. It is the reason they can solo the high level nms and deal enough dmg to kill them before rage.

Sacrafice III is also fairly broken, about the same strength as cureIII with a powerful regen. Emulate will be nerfed I have no doubt about that... it is only a matter of time. Thing negate like 80-90% of all elemental dmg you take.

As other said the debuffs are really potent but so short they are almost a waste of mp to cast, slow really slows the mobs attacks and paralyze is godly. Issue is slow last about 1/4 as long as the recast... like 10-15secs. They need to increase this to like 1-2mins at the minimum.

Absorbs are not as bad as people are saying Roaming Soul + Absorb is a 1min 50sec absorb, drain sucks and should never be used. Melee will thank you for the absorb accuracy buff for about 2mins. I still think these need to be increased duration wise though, even with roaming soul they are still fairly short buffs. Maby make it 5mins or something then it would be worth casting.

Like Rdm, Thm is the endless mp pool. siphon mp II can refill over 1/2 your mp pool in 1 cast (which is on a short timer) if you target 2-3 mobs.