It all depends on what other people are playing with at that specific point in time. sometimes I play and if I notice a lot of GHEIST/ROOTS I'll make a SKEELZ deck, if I notice a lot of opponents playing with the attack manipulating clans (HIVE, UPPERS, HURRICAN..) then I'll try my luck with a RAPTORS deck. it's all very circumstantial to what others are playing with when you're playing,
Survivor gameplay is completely different from every other mode. Less outcomes. To win you have to have overpowered cards that you can abuse in your favour like rocktana, b mappe and kuwaka. E.g kuwaka you bluff this card you can basically make your opponent flip a coin where they have 50% chance of losing outright.