Tested for over a month, you DO NOT need Raremon/1-of Ruin Mode/DeathX.
Sistermon is sufficient @ 2 because of her 3 cost, Lucemon (Rookie) can use his On Play/SOMP effect twice before being trashed so he's a Draw2 (out of 6), Glaive/Mist memory for optional playstyle - Can use 4 cost 7GDL option to pull out Beelze, pop mems and wincon with Ogudo for an earlier finish if you notice a good setup. CRAZY deck with an optional playstyle suit to win against Angels & Magna X