Zombie deck for the synchro festival, with two small engines to help extending+ash baiting.
The assault mode+dawnwalker engines are most of the time used to summon chaos ruler asap, mezuki+necroworld banshee at 3 give you a pretty solid chance to mill them.
In the side are options you could also run, if i had enough dust i would've probably included the synchro's and played a 60-card grass/danger version.