If you'd invest in x2 Mark Power, I think you can slash the wind pillars and dragonflies. You'd need Lv. 10 at least, which isn't too hard if you can grind a little at AI 3.
Remove Solar Shield and Holy Lights, put in a couple dragons, one or two more Blessing, maybe another Sactuary, and maybe a few light pillars if you need them. The best way to find out is to try your deck in the Arena practice and see how it does.