Suggestions for episode XX

[DaveNeedsHelp]

Hi all, I’ve struggled through the last few episodes but I think I’ve finally hit the wall. Any advice on beating this guy?
His team as far as I’ve gotten:

1. Ashterios
2. Crimseias
3. Lavaronix
4. Deodragon
5. Moltenpede
6. Keeperdragon
7. Doomengine
8. Magmarinus
9. Emeraldont
10. Timberlord
11. Grovodeus
12. Gnashjaw
    My monsters + the team I used on XIX