This build is mostly an auto-attack build, but with the resent buff to Focused Attack, the build gradually becomes a bursty build due to the later talents; such as Executioner, the second charge for Penetrating Round and Nexus Frenzy.

If you're having trouble surviving, then pick up the Give Me More! talent at level 1, but as soon as you get Double-Barreled you should be good, due to the slow from Hamstring Shot.

As a last little remark.. I'm not sure if it's just me bugging the game out, but I've been able to out-range normal towers with Nexus Frenzy, because of Raynor's Trait Advanced Optics.