I believe infusing transfusion would bump your staff one more level to +3. (I'm not sure tho! I get hazy on the math for this at +3 I could be mistaken)
One of the mage's talents is (at +3?) 100% chance to recover an infused wand from the staff at +0 when infusing a new wand.
So if I'm not mistaken above, you can upgrade your staff one level with Transfusion, and then infuse Corruption or Regrowth to use at +3
You have a Chalice already and no allies, so transfusion isn't terribly useful until the Prison and Demon Halls levels. You could sacrifice its level and play a Druid run, or if you pull the Corpse Dust quest from the wandmaker consider a Necromancer run.
Personally I'd wait until you get to to Wandmaker, and if you haven't already, put some talent points into that Infusion talent