xigbar
Explorer
buffing happens at the start of the day, when SR doesn't matter, healing happens outside combat (or in the case of a persistbuff cleric ally, you'll have at least fast healing 1 all day long), so if you really want your buddies to waste actions mid combat to heal or buff you, you're doing something wrong as a flying invisible ranged weapon. SR is always more useful so long as you don't have noobies in your group trying to cure light wounds you when you just took more than 13 damage...
The warlock class keeps increasing the DR, so this guy will have more DR than a barbarian. It is very meaningful to a character with less HP than everyone else.
emphasis added.
Um, I think you misinterpret how SR works. It's constant. It doesn't matter what time of day it is. If you're asleep, you have SR. So it does matter. Good look competing with classes that have access to even just the buff spells in the PHB, whether they're for in combat use or out of combat use. DR is also fairly easy to get around, but, in any case, it doesn't do anything against magic. Every spell in the school of Conjuration also doesn't allow spell resistance. Your emphasis doesn't really add to your arguement either. Actually, it comes off as kind of condescending, but that's a separate issue that Empirate already pointed out.