Laning/Early Game Survivability is key - Geist can have the excellent ability to get initial minion kills, but she can struggle with denies and secures due to her fire rate and ammo. If you can, try to melee the minions!
Laning/Early Game Optionals If your struggling in the early game, ensuring extra survivability or kills may be needed. Geist dances with her own life, making trips back to base tempting, but risky due to farm loss. These aim to provide her with more survivability, letting her stay for longer. These are likely the first options sold if needed.
The Start of Damage One of the key parts of Geist's kit is stacking Malice (her 3 ability) on the enemies to then out-range them with both her gun and Essence Bomb (her 1). Due to the skill focus - the primary boost will be Spirit Power, as our weapon damage is essentially carried by Berserker stacks.