How high does Will Save need to be to be moderately useful (Saving at least 25% of the time) at endgame?
I have Dwarven Ranger12/Fighter 8, whose current self-buffed Will Save is +17 with GH. I could push this to +19 with a couple of adjustments, and to +22 with a +3 Exceptional Will Save Green Steel Item. There are probably some other situational buffs that could push it higher.
Is a +22 Will Save worth the trouble (and the Larges), and at what point should I just dump it completely?