3-marked the Senlac.
The requirements where only a bit above 3k combined, which is not to high (higher then all tech tree lights except LHMTV and all premium lights except LT-432, EBR75 and LT-432). It is on par with heavies like Obj252 and E75TS and Bisonte.
So how good is the tank?
It is absolutely trash.
TLDR: Play the HWK30 instead, it is better at everything. Better camo, better alpha and dpm, better speed, same accuracy and same 410m viewrange.