To beat cubos getting blueprint tiers helps a ton and if you can manage to get a universal spell fully charged before you die you might be able to one shot him with a high enough base missile damage and special power
also to everyone who is losing their saves: just export the save code every time before you close/refresh the game. its a tiny text file so it takes almost no storage space and it takes at most a few seconds to do it and it can save you so much time if it doesnt save automatically or your save gets whiped after a while
i swear, why is every recent comment about wave compression wrong? yes 11x compression is worse than 10x, but that doesn't mean that a higher wave compression is worse than a lower one. the reason this happens is because 10x wave compression only gives boss waves which have a lot less enemies while 11x lands on a normal wave 9/10 times which have a lot more enemies. for this same reason a wave compression of 5 is also better than 6 and 7 (8 and 9 are still better than it though)