When you play soulkeep you are to choose what to do and what to play with as for towers and as for spells and this is what you have to know as when you use spells you got a magic effect and so on for towers but most towers are for attacking and less has a special effect.
There are also Here and in the Market there are only Celene that you can buy and rent and when you play with it, you got a very good advantage and this is for its effect that includes melee attacks and also range attack and it can be used without using mana so this is also a special effect to be taken into consideration.
As For Spells when you use Venus Fiendtrap then you can play well and defend your gate and kill up to 5 fiends in the way and who are about to enter the gate then you could save you hearts and pass the wave and in turn the level.
Raining Cats is also amazing and one of spell thst could do a lot in the battle and so you could eliminate a group of fiends that have low HP in the field and may hurt some of those strong armor and those with High HP to be taken into consideration.
One of spells that has a great effect and this on towers as it doesn't have an attacking ability and this one is Gear Grease that are amazing and have also a great effect in towers and this in decreasing its fire interval.
Stew of Doom is also good and so cheap so using it to make explosion for a small group of fiends would have a good effect and help also and this is just for 5 Mana without costing you so much.
