Board Thread:Game Discussion/@comment-9890645-20150213121239/@comment-10520512-20150322192132

Devastator is easier to get to SS. Just play normal Cyber rush, get coins, buy 2 missing bots 4*500 coins to get 20 cyber keys, merge all bots and you get 30 Devastator cyberkeys. Kinda easy.

Superion and Menasor are harder to get, since hard and veteran level are a challenge to complete, and even then it will take longer since you already have Devs.