Hi

Can anyone please suggest me what to buy next or upgrade ?

I was about to add my hangar image but i couldnt

So heres my hangar :

Panther (16 energy level 6)with Arc 10 and Arc 6 with pilot Neev(i got from playoffs)

Killshot(energy 12 level 7 rank up cost 1875) with nade launcher 12(playoffs) with impulse (playoffs a year ago)

Guardian(16 energy level 7 rank up cost 1250) with disc 8 and pilot crow

Ares(12 energy level 6)with fusion cannon 6s with pilot red https://omegle.onl/  

Last waste mech in my hangar - Arachnos with dual longarm 8s and pilot maverick

I have other weapons too like MR8,RM12,SB16

MY MAIN QUESTION :

Should i rank up any mech now or should i buy pilot stefania or any other

And if i should rank up mech which one first - Killshot or Guardian ?

Also i am an F2p

My in game currency- 752k credits,1273 a coins

Thanks