I've never even seen a mirror so bare with me but I noticed your jewels are missing some magnitudes or seem to have a dead mod or two. You could also go for corruption and find a spicy adorned.
Could also pick up a megalomaniac jewel with cooked on it for I think 1200D or so last I checked.
If you can spare two es/Crit/aoe nodes there's also 52% damage in two nodes to the left of blood transfusion node (slight life cost increase)
I took spell cascade out of my coc personally as it nukes damage quite a bit (I switched to spark but may try weakness again). Doedres/weakness is really good at building energy so you shouldn't notice too much loss from not casting as many comets. Could also run uhtreds augury for more levels instead.
Lastly since you have the currency you could try a dueling wand and rathpith combo. Spell Slinger can cast another comet or use it with overabundance and living bomb for better infusion uptime.
I'm no expert so some of that may be wrong but maybe I gave you an idea
Edit: clearly not an expert as you'd have to go mana stacker build to make the most of rathpith. Possible but something to consider