1) You should use
mark and
pendulums for faster devourer.
2) You don't need 6 bonds, 4 should be enough.
3) Add some steals and a dragon or two to mitosis after the opponent is locked. (and maybe use a vampire stiletto if you have it)
Something like this (you'll have to test it though)
Hover over cards for details, click for permalink
5c6 5c6 5c6 5c6 5c9 5c9 5c9 5c9 5ul 5um 5um 5um 5um 5um 5um 5up 5up 5ur 5us 5us 606 606 606 606 606 606 606 606 606 606 606 606 8pn