Laning Discussion: Bristleback Jungle

This ^ is the closest video I can find (it doesn't use Mid Range Spirits + Right Clicks, but it's not hard to imagine that part), but the way to do it is to stack up on Claritys, using Long Range Spirits to Stack, and Clear Camps quickly. You can switch

At lvl1:-

Spirits do 8 Damage to Creeps every time a Spirit touches them.
All 5 Spirits complete 1 revoloution every 2.3 seconds regardless of how far they are from Io
The Spirits' duration is 19 seconds

5 * 8 / 2.3 == 17.4 DPS

17.4 * 19 == 330 Damage every time you use Spirits

...and that's just at lvl1

Having said that, Satyr Tormentors and Centaur Conquerors have 1100HP, so it can take a while to clear them (hence why I recommend using Mid Range Spirits, so you can Right Click the tougher Creeps down).