Use this build in-game
Build ID: 788254 - copy and import it in the Deadlock shop
The idea here is you want to be able to do good damage from a distance. The 15 meter min distance on Long Range and Sharpshooter is way closer than you think. Two points splatter and then max out puddle punch to make it easier to keep spellslinger stacks up.
Recommended ability leveling order for this build