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.
I have used Slime Lord for a reason and this is for helping other towers that are slow and with high fire interval to slow fiends for them and give them a time to attack and to defend the gate.
Slime Lord also could attack and do some damage to fiends and it is not high but as a tower like it, This would be good to be with a tower like Slime Lord Two features of defend and attack.