I have a new formation for soulkeep level and this attempt would be different as I will use strong towers to be with me and also fast tower to use in a battle to pass wave after wave as in level 5 there are 8 waves and also 10 hearts available.
So I would start with Ivory tower as it is a one with high physical damage that could do a lot in the battle and if you use it will, it will eliminate much fiends in the field so using Ivory tower would be a good choice for facing fiends in the battle such as Terror Mite and it is one of fiends that are good and also Bloodling and may be blood queen.
One of towers that are good also in the field are Charnel Pit and it is one of towers that are fast and their attack is area attack as I see it throw skulls in the field at fiends and I like to use them in second position to eliminate those low HP Fiends that are coming in Groups and Could escape from first towers.
Card Sharp is also one of magic towers that could attack and get a cool damage against those who have armor and could escape a physical attack and this one could be used in first position as a tower of choice for nearly all types of fiends that can attack in the battle.
Fountain of Terror is also a tower of choice as it has a high range and could use this tower to attack two ways that fiends came from in the battle and in this case its effect in eliminating fiends would be faster and could do more damage to those that are coming from more than one way.
