I like the tank a lot, It can be surprisingly quick. but with the recent influx of jgpzE100 and so much arty for some reason it was a frustrating 3 mark. Arty in particular is brutal, I hate those things. The is4 gun becomes kinda useless once stunned.
Hardening, rammer, stabs with rammer direc
Hardening turbo rammer with turbo direc.
using the second config the IS4 ZOOMS. try it sometime