In this case, the buffing isn't a problem. It's doing something interesting once the auras are up. Lacking the feats and BAB to really make a damage dealer, the next best thing is debuffs, most of the extraordinary ones being fear effects (which is a good set, but eventually we'll run into something they don't work on).
With Human Paragon, you can have max ranks in Use Magic Device. That should give you plenty to do.