[@Flamelord]
Mhm, its easy to nerf anime characters just as easy as it is to make them op asf. Just gotta find a suitable time to pick them up from so they aren't as strong as their present counterparts. 

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[hider=Cause I just wanna talk and have a little debate]
But on your example on Lelouch's Geass as a NP, it would follow its same context as in the anime meaning its a single-use ability per victim. So in order to counter this single-use drawback, it would be pretty clear that the Geass will have some sort of strong ability to even pierce mental protection. Making him a force to be reckoned by all classes including Saber despite their natural resistances. Cause in reality, Lelouch if thrown into the Nasu-Verse as a Servant would have absolutely shitty stats when not using a Mech so his only good quality as a servant would be his NP. He would still obviously have his intelligence, but it would be up to whoever was playing him to actually think smart as well. So yeah, Lelouch would be a situational servant, that will most of the time be outclassed even by other casters. [/hider]

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[hider=And Cause I'm bored...]
Hmmm, what do you think of Killua from HxH as Assassin? He would be pretty good summon for the assassin role obviously, along with his Nen training. Who do you think would be better to fill the role and outclass Killua?[/hider]