I have been doing IT with friends: tank (107), 2xiss (2x BR), healer, 2x yul (106, 107), dread (107)
1yul was geared Bloody R110 weapon +7, armor+6, insanity talisman, venir 18, abu lvl1, skills +6, very low skills pow % and skill crit dmg, dye +5 (STR+DEX) minimum, radiant+0, lindvior, atlas+12, creation+5, tauti, blessed valakas
1x dread (orc) was geared exalted armor, R110 weapon +6 and skills +10
1xtank was geared exalted armor, skills +10
Others were all exalted. This was really short to finish 150/150 but we did it, luckly some half crits from yuls in early HP helped a lot.
If full exalted gear runs into IT, except doing lots of "half-kills" you may finish with time otherwise I see it as almost impossible. People may want to be sure to finish the quest everyday instead of spliting it into 2-3 days. Prepare Roses + Santiago buffs to help.
Try to make a CP for IT this may help you out to increase your chance of getting a pt.