Have been away from the game and since ive been back have seen a few pets with double socketed. when i ask these people they have no responce. Also keep getting different collars what are these for?
There are some premium jewels that have two talents. This does not change your pet, or require a special socket, you can add them like any other jewel.
The reagents are to unlock the new active powers AFTER you manifest them. So for example, if you get a pet that has will-cast [whatever fire spell] you might need talent, elemental, and fire tokens. Some are harder than others to get. The will-cast abilities can be very useful.