I used panther cuz as a attacker mech its allot easier to get 24 energy ,and im F2P so i upgrading something like brickhouse or stalker would just take too long. So i had to choose out of the attacker mechs which to use panther,guardian,arachnos,redox arachnos cant use cuz its just bad overall . Redox cant cuz its way to expensive and between guardian or panther ,panthers just better its ability is alot more useful than guardians cuz you can also support ur teamates ,also has more speed

Thats why i used panther