Gate Defending Plan and Tactics

If you start the game again with the same formation and the same towers you could see this scene again so whatever you have to do is to do some changes that I would to take to you about as first one is to use a spell.

Using Venus Fiendtrap would be a good option to put it at the gate and it will get rid of 5 fiends before they could enter the gate and second spell but it is less effective which is Raining cats that also could damage a group of fiends if their health is low.

You can use a strong upgraded tower just close to the gate and it will do the mission for fiends that have escaped from towers and about to enter the gate but if these fiends are bloodlings like below so you have to get a distance from the gate and have a tower with good range.

Slime Lord is amazing tower and has a very good ability at any battle and jus a wise use of slime lord can turn the battle upside down and this is the power of Towers in Soulkeep that you can slow down fiends by a tower like this that could throw a slime at the way of fiends and this would help to get a best in better attack.