Early CoreRestorative Shot first always. Extra Health if HP is high, Grit if low. Skip the other one until going for the upgrade.

Early Survival Opcional Buy one when needed, ideally AFTER Early Core.

CoreL->R is generally good, but don't be afraid to skip things you don't need, or buy Cheat Death / Vortex Web early.

Support/Disruption Opcional Mostly counterpicks.

More Gun Opcional To finish investment when needed.

Tank/Escape Opcional If the keepaway gameplan isn't working.