Aviak Spirit Totem

[Sian]

Well you can still hunt them for the augments, but like I said, drop rate is low and they are quite a challenge at your actual state of gear

[Ydiss]

Even when you can take them down easily, they respawn very quickly so you need to be fast to get up the ramp. Boxing that crawl isn't a simple matter, too.

By the time you can reach and kill the boss, you'll have better pet focus anyway. We just clear the ground and lower levels for augs.

[Safiya]

You can get the same pet focus for significantly less risk by farming LDoN's and/or World Bosses for the tokens. Enchanted Power only costs 4500 points.

EDIT: Sorry, nilbus already mentioned that.