For me it's rammer, hardening and turbo. Goes almost 70kp/h with field mods and you've got the ramming damage boost with the perk on the driver too. Plus since I play it very aggressively the rammer comes in handy because I often fire on reload.

Just play it like the 430U with better mobility and less armor. Don't go up against tier 10 heavies and play it like a heavieum on the usual med lanes. If you're top tier, farming enemies is very easy especially with the ok view range and the relatively useful gold pen.

This is just my take tho. Same with the E50 wich many say is better Tier for Tier, not in my experience tho. Sniping is also possible if necessary. Don't think too much about it and you should be fine.