[thejeff]

True, Power of the Grave might well be worth it. That's ramping up into marginally dangerous territory.
E4 might well be worth it then, especially since you have only minimal E access otherwise.
Of course, if you don't go E4, Holy Avenger probably isn't worth the extra fatigue and if you don't take a bless at all, you're left with only PotG and low enough fatigue not to need one.