100% Agree, there is too much rng in this game already and skill trial should not be one of those systems or at least put some pity value so it's not possible to be completly destroyed by rng.

EDIT Synergy if you want to know from my experience how it went for some of those ninjas i can give you a short list

1) Kabuto - around 400-450 protections to fully break him (both of my friends from server took around 600 to max him)

2) Rinne sasuke - around 250 protections to fully break him

3) Kimono shisui - around 200 protections to fully break him

4) Shark Kisame - around 500 protections to almost fully break him (missing chase)

5) GNW Madara - around 400 protections stopped at that point with out maxing mystery

So yeah RNG in skill trial system is absolutly insane, Nishi spent i think over 1000 with out maxing his 10t Madara yet