I have a fun idea for an Assassin that's outside of the Hassans, if your willing to have me then I'll get to work on that. 

(If I had an opinion, lore-wise, I feel like Archer Herc could confidently do a 1v6 in a normal Holy Grail. Six Servants? More like one [s]trial[/s] sidequest to notch onto his belt )