The scutter tizik combo fails if I don't get mana regeneration early to be honest. Heart of the ocean does it for sure that was my first calamity win or maybe a combination of a banner with another mana generation item could do it too. The mudgil skimander combination is reliant on a early weapon or speed item for skimander but they don't have to be rare I think, otherwise they are very vulnerable and certain encounter are a wipe.