I tamed more that 5 PTs and encounter more than 70 . Now I have a lv154 PT in medium difficulty.

I will give a suggestion I saw so many people posting that to tame a PT with a club and probably they tamed a low level PT not more than lv 20 or something. Unlock trank arrow then approach it bolla and hit with trank arrows. Don't tame a low level PT they can't even carry 50 arrows