The last time I played a Blood Mage I found the ultimate cheese: BLUDTOPOWA to start, then I found LEMMISI and BURNDAYRAZ right off the bat and Mystera's altar just afterward.
- Worship Mystera.
- Activate BLUDTOPOWA.
- Find a high-level monster and fireball it, then cast LEMMISI twice to restore mana back to full.
- Repeat previous step.
- Pause and get the Faith boon as soon as you can afford it.
- Keep throwing fireballs at his face and LEMMISI'ing until the whole map is revealed. After Faith, this gives you a net of 1 piety per dungeon tile revealed, and depending on when you started this adds up. A lot.
I had enough piety by the end to get EVERY boon from Mystera before leveling even once, then used the leftovers to convert to Pactmaker with 60 piety to start with. Level up as normal and buy Learning, then Mana, then Health, et cetera et cetera. Not having squares to explore for recharging is more than made up for by the ability to plan out every move in advance. I ended up killing the boss at level 6. --OrigamiGuy