There's not real super dominant meta right now you you can use what feels best in your hands and fits your playstyle.
Rilfe top tier (in no particlular order)
AMAX
KILO
M4
KRIG
RAM
SMG top tier
Mac10
BFROG
LC10
MP7
MP5 CW (Trash after 10-12 meters)
PPSH (More of sniper support than SMG)
I...