Animal Companions & Runesmith question? (Free Archetype)

Hello all, am I missing anything but is an animal companion good to great for runesmith players?

This seems to be very useful, as your getting:

1. Extra movement as you need it depending on combat style?
2. The good combat runes also apply to unarmed attacks, or could be made to affect the attacks of your beast due to damage types being available?
3. Weirdness and fun RP.

Some Examples:
Esvadir or Marssyl seems great for a riding drake for example. Either giving him a very deadly attack or some guaranteed aoe damage, either way this would be solid.

Repeated Horse Sales that you always win at :) with Zohk.
-Other fun injuries: Assassination of a noble via teleporting their horse out from under them. Being tossed off a horse causes injuries pretty often. Although this is difficult without some way to do this at much further range.

Etching Tilus on your horse for some fun Mr. Ed shenanigans.