By Island 2, you should have some Power Cores. Prioritize upgrading your mech's weapon damage, movement, or health, depending on your squad's needs. For example, if your Prime Mech is your main damage dealer, upgrade its weapon. If your Combat Mech is taking a lot of hits, consider health upgrades. Also, look for passive abilities for your pilots that complement your playstyle. check the shop for new weapons or pilots.
