Why is the Profundity Bonus Tier so Painful?

I watched a large number of videos, unlocked ProFun today, and then got to 5* through refreshing the bonus tier. Phase 1 and 2 were a pain and super RNG dependent, but the bonus tier was easy once I followed the strategy in a video i found (its the same one posted in the thread above from Songeta). Basically use ghost, outrider, Ywing. start with. 2nd Profun Special marks XB. Use outriders 2nd special 1st to gain Download. then his next turn use mass assist (1st special) to finish off XB. thats pretty much it. I don't think i lost once, and my non-req PX pilots are G8. Even if Exec gets the perma TargetLock just keep going until you pop your Ult and Outrider super special