Flamvell Zombies (need some help)

I've been totally stumped at how to make this deck better/more consistent. Pretty easy to make level 8 synchros, but I can't make Formula (which would be cool fo show, and Shooting Star would be nice) + pulling out Red Nova Dragon is a lot harder than I'd like it to be.

Here's the decklist:

Monsters (21)
2x Card Trooper (was using 2 ryko before, still unsure which to have )
1x Dark Armed Dragon
3x Flamvell Firedog
3x Flamvell Magician
2x Goblin Zombie
1x Gorz
1x Mezuki
1x Neo Flamvell Origin (totally don't want this here, but it is a level 2 tuner for Red Nova)
1x Plaguespreader Zombie
1x Sangan
1x Spirit Reaper
2x Summoner Monk (a lot of spell targets and makes getting out the right monsters a lot easier)
2x Zombie Master

Spells (15)
2x Book of Life (almost like monster reborn when Z. World's out, + banish 1 card from opponent's grave)
1x Burial from a Different Dimension
1x Dark Hole
1x Foolish Burial
1x Heavy Storm
2x MST
1x Pot of Avarice
3x Rekindling
3x Zombie World (helps flamvells and zombies have a lot more synergy, IMO. Important card)

Traps (4)
2x CED
1x Solemn Judgment
1x Torrential Tribute

The deck does pretty well, but it is occasionally not as consistent as I'd like it to be. Please help and be gentle to my baby

At the very least:
-2 compulsory evacuation device
+2 solemn warning

Will try double Solemn Warning, but I don't really like when I have no traps that can be chained to MST or Heavy (except judgment but that's not really practical). Any other changes?