I'd just like to add a little something in from my experience. Everything is useless except for strength and dexterity. You don't need END because you can heal yourself. You don't need SPR because you already get plenty of SP. I'm not going to bother explaining INT. DEX is minor, but still helps because Clerics do plenty of soloing. I solo monsters that are deep red to me, (Hobs, Baby Werebears, Ghosts, ect.), and I used to miss quite often until I got my +11 DEX hammer. The STR helps your damage keep up with the warriors.
But I guess if you just want to heal and support (boring imo), sure pump SPR and END.
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