Excellent macro but has issues. Firstly the Arcane Shot proc works well at 50 but not at 60, the reason is Arcane Shot becomes part of your rotation, otherwise, you never use any focus. You stay at 100 focus the whole time.
Explosive Shot and Double Tap need to be added, Double Tap is a must according to Icy Veins and Explosive Shot at 60 does a lot of damage for AOE more so than Multi-Shot.