What date will the patch be that puts mages pets back in the vendors?

[Siege]

Are all pets purchasable after that patch or just one pet per rank?

[NegaStoat]

It's usually two per rank, but I think level 24 just offers one (earth) and there might be another spell level tier that offers just one. Either way, it doesn't really matter. The big boon is in general if there's a specific pet you need to research, the previous tier of pet for it is nearly always the one of the staggered selection that lets you purchase it for the combine, rather than having to do chain research.

[flacidpenguin]

Originally Posted by oldhead [You must be logged in to view images. Log in or Register.]

or necro.

Necros have a few research only pets as well.

[Jimjam]

Originally Posted by flacidpenguin [You must be logged in to view images. Log in or Register.]

Necros have a few research only pets as well.

Iirc this limit can generally be circumvented by savy players visiting SK spell vendors.