btw i didnt realise rangers were reworked and deal damage based on enemy count (earlier it was based on enemy armor)
so with that new info i thinnk its totally fine to just make ranger team if IK wont work for u, something like
anariel
ranger
ranger
alchemist
+yellow/green banner
or
(i think this one below will be best for you in the end)
i definatelly choose this, use this 
serpent
ranger
IK
alchemist
+dragon banner