Burning Arrow Marauder help

Hi I was wondering if some kind soul would mind taking a look at my tree and giving me some advice for mana nodes in order to maintain a grace aura at minimum preferably atleast a damage aura as well. I absolutely need grace for iron reflexes but would like to know where the most efficient nodes close to my build are. Any other advice is also welcomed as well since this build is a work in progress as well. Thanks in advance. :)