It’s not formidable, it’s not better than a tank or banshee, hell it’s arguably not even better than a Ghost Ultra and yet it’s 2-4 req levels above the aforementioned vehicles.
My experience with the Mantis has been almost laughable; walking out of home base, seeing an enemy Wraith and them hitting me with a single shot kills me. New Mantis getting hit with a single Wraith shot killed me? Seriously? The damn thing will explode after taking a few sustained shots from a BR and a stiff breeze will finish the vehicle off.
I don’t want it to be OP but I think weapons and vehicles should scale to the Req level. The basic Mantis shouldn’t be over 5, maybe 6.