oh, its definately worth it. my thf is 35 now, and im having lots of fun. i can treasure hunt semi effectively now(should really wait to lvl 40 at least). when i stack sneak attack with trick attack i do about 200-240 dmg to an IT mob. when i add the viper bite WS to that i do about 340 dmg. its pretty sweet. if you can get yourself into a well balanced pty with people who understand how a thf works then you will be set. thats the problem though these days, either no one understands even after explaining to them what the strategy should be or they just dont care.
oh, and mug is gay......might as well ruin that for you now
another example of how good it gets.....we just had an LS event and did Mission 9. we had 18 ppl from our LS alliance for this, it was massive overkill but lots of fun. We had to go to Delkfuts Tower on Quifim island, fight through 10 floors to reach an NM at the top. then fight then NM 3 times for some keys that you use all the way down in the basement. it took us about 4 hours cause we had too many people, normal time is about 2 hours for an alliance of 29-32( we were all 34-37 with a lvl 40 pally
so we kinda cheated). some wrong turns, a few unfortunate accidents and waiting for some really slow ppl so we could actually start it contributed to our time. you get 5k and Rank 4 from this mission.
next mission is the one we all have been waiting for, Airship Pass mission!!!!! 8 hours and a full alliance of 40's gets you rank 5, 10k and the airship pass..... will be a good time.