Allies gain a +2 bonus to all attack rolls, damage rolls, saves and skill checks, and are immune to fear.
Ok, assuming pointbuy and a melee marshal, pointbuy is going to take a lot away from combat with the cha--
It also doesn't allow both attack and damage, and all saves and attribute skill checks are separated into nonstackable bonuses.
Though now that I re-read I thought the minor aura effects were STR based and the major effects fixed to level.
The bonus for the minor aura effects, individually aren't too bad but together (10 minor auras) is just a biiiit much, especially if you have a pixie marshal cohort double-boosting the effects.
As for granting to yourself vs. others... I think boosting others is far more powerful, thats the difference between a spell and a mass spell on all your other team mates.