Damage Amplifier to Fiends in Soulkeep
I focus in this period about spells and they are really well especially which are in the market that have a great effect on the direction of the battle and if you want to be a real soulkeeper just use them in the battle and be familiar with everyone as you may need it and it will be the only saver in sometimes.
I have tried Mana Mania and I have fount it is a hidden gem in the market with its effect to increase mana used and in turn you could use more towers and upgrade them and in this case you could pass the wave and it is better than Cheapo as it can be used 3 times in the battle.
So as you can see the difference that spells could do in battle and the effect on both fiends and also towers so you can be good with it and you could be a real soulkeeper with just few spells that are cheap in the market and with only 1 DEC if you want to rent them and try them in the battle.
I have tried also damage amplifier as it has a great effect as well as it could be used 5 times in the battle and if you know this is a very good number better than most spells and with a reasonable radius that could reach 100 and duration of 15.
Damage amplifier has a damage multiplication of 1.5 and this is very good to decrease the time that is needed to kill fiends and also increase mana gained from them as if a tower has a physical damage of 100 so it would be amplified to 150 and this is the best thing about this spell so I recommend to take it from the market and try it in your battles.