Use this build in-game
Build ID: 212539 - copy and import it in the Deadlock shop
Most "pro" Geist builds mainly build into gun Giest. Gun giest is not bad, but at lower ranks building into spirit/heal giest probably gives you far more value. Once you max your bomb and have spirit lifesteal, SSB, and healing boost, you become extremely tanky. By eventually buildling into your daggers with surge of power and reverb, you can do 400dmg in a single hit of your knife. Maybe this build will not work for you, but it has worked for me in phantom lobbies.
Recommended ability leveling order for this build