Heres a good Lvl 40 farm deck. Make sure you either have 2 barriers up or 1 barrier+1 ring of Mag equipped to you wall active at the same time to avoid 1 of them being wild tornadoed away. Do that and he literally cant touch you. 2nd to last turn you set summoner and dimensionhole it away. Final turn, before anything, murmur his mammoth so its effect wont screw you over. Then flip summoner, sac wall for BEUD or MoO, summon Vassal and you're set for game