Soulkeep Towers are those who determine whether you could pass a group of fiends or not and how to play and how to pass a level and if you choose a good towers whatever they are common or not but you have the best use of them against fiends then you could pass any level.
Three Towers that I have tried and Found they are so good and could do a lot in any battle and for fiends that are common and that have the ability to attack you and also defend against their groups you can use these towers and you could benefit from them in a perfect way.
I have used Card Sharp and I have found it is amazing card to be used with its magic attack that could eliminate any fiend in the way and also with slime lord fiends would be hit so much.
Nightshade is a perfect tower and you can not give up on them if you are using strong fiends and if you want to pass any level that have fiends with high HP.
