Ok lets say the common thing "All classes are good even if not full donor, if you know how to play it"
Now leaving that lie by side (Run and Azal is not really "know how to play a class", same for HOP & DI ) Mentalist are bad, even as full donate (thx knock-back reduce
) slayers-crack-seraph are PvM chars so not in consideration.
YJ (harles) are good, only if Full donate, otherwise they are useless cuz low damage (even full donator in full damage cant kill a FM in STA year).
Templar is just a Wall to hit and reflect, as non donor, you wont reach 1.2b+ Hp, so u will be 1 hit (azal) killed and wont have chance to kill (since damage just sux) .... Now we just have Arcas & FM, for an arca dont use Eva storm, use windfield cuz insta damage, but i see them as "kill as many as u can before ur dead" so being honest, as non-donor wont reach damage enought to kill as much as posible..... So... Guess what? xD Yes ! ForceMaster is for you ! (even as a full donor, iw ould say FM )