I have not yet tried as im no joke scared to bring them out just to find out they are bugged and watch them die for no reason lol...IMO you don't need anatomy as a Dex mage, just use lesser heal, you can get blocking. You don't need daggers if you're a taming mage, that's the pets job (yes I know they don't always work).
Have you had the birds chase a mounted person? Do they hit the person/horse when 3speed?
My point was you said tamer mage is not a shitty dex mage he is if you cant use your pets cause they are bugged atm....
as a dex mage you get
Daggers
Block
Offensive stance
at the very minimum these 3 skills are very helpful for combat pve or pvp vs having a pet that does nothing so yes you are technically a shitty dex mage, if you have a pet that works then obviously this makes up for the loss in 3-400 points.