dude, obviously can kill with staff, but why will ask facu if I see it myself he always on dagger because dun have balls to fight with staff in the middle of pk.
We talking about the classic complain about priest got high ac and bla bla for can kill everyone with ld+click must have whirling on, that mean can die also easy coz lack of 36 points of white ac. Priest is the most balanced class in that way, if want to kill must unwear parry and use whirling, otherwise if use parry d4 priest cant kill a d4 wiz with LD+dagger.
Priest is the class most chased by everyone because they can ress, got same HP as thieves or archers but need tank everyone. Will be good how much chance of survival got a warrior with extremly high hp and ress skill. Im sure warrior get raped easy too.
All the power given to archer with ac debuff and increasing ex´s dmg ingame made Priest class be a shit. On any change you made giving more power to some class it will be a shit for priests.
About ur suggestion, I believe isnt hard to make alternative bank where you can deposit your RE as if it where Crits, and go merchant board and being able to buy items from who selling for RE.