Rasenmon never dies ?
Basically it's get a big stack, digi-burst or use a Neferti stack to remove any threats, use your Rasen/Fury combo with an active RizeGrey inheritable to clear out 4 security, then go into Ruin Mode or drop an Odin's Breath to cripple your opponent's turn. If all goes well, next turn it's Ruin does 2 checks, does his dummy good on deletion effect, and then you can use a promoted rookie or hybrid for game. I run 5 eggs because Ruin Mode will help you use up all 4 if you only run 4, so that extra 1 can be pretty handy in some matchups. Kyaro only goes off when TK or Sala X activate, so this egg can be swapped out for any other yellow egg you like.