there's nothing wrong with your deck. The only thing is that it's not so creative and it certainly can be improved. you put a life mark, could have put some pendulums too.
1. Avoid PC
2. gives sufficient quanta for firefly
3. fire fly produces
. why choose that instead of other creatures since you don't want to use the
quantas?
or putting rustler? heal? or even epinephrine?
4. Wyrm should be ok. Running upped version, you'll see me using 5 wyrms and 5 fireflies, you can add 3 or 4 blessings. Mark:
fog shield, weapon, and pillars + pendulums for the rest of cards till 30