first welcome to the game
I think I'd put the movement rate on 7", nice and quick and not overpowered because of the AI restrictions
AI: being a robot dog, it needs someone to listen to, so IMO it should stay with its master at all times (5" in 2001 synthetik rules) now you can go in 12 directions:
6: if the master dies/binds it to a tree and leaves it will stay on the last spot its master was in range and accept any minifig that walks by as it new master, including enemy figs
7: same as above but only friendly figs can claim it.
8: it will defend the masters body against all targets
9: as above but will not attack friendlies.
10: lists shouldn't go past 10
11: as 8 and will accept any friendly fig as its master.
12: it dies with its master, other figs can loot the rockets for entertainment purposes.
other idea: the master carries the rockets and must spend an action to reload the dog.
commands: the master can issue commands to it, like:
fetch! (nominate 1 enemy unit the dog will attack until it is destroyed, after which it will return to its master before doing anything else. targets may be outside command zone, but within LOS)
Stay!(dog stays while master leaves, and defends position against all/enemy intruders)
Roll! (dog rolls over)
speak!(dog barks and fires rocket)
Dead!(Dog selfdestructs for D10 exp. damage + 1d10 for every unfired rocket in the dog)
heel! (dog stops doing whatever it was doing and goes back to its master)
hmmmm, I need to get me one of those