Okay first of all: What do YOU want?
Do you want to have 1 more orb on your gloves? Then go ahead and cube those gloves with a rare ring and a rare amulett.
If not, don't do this. In the latter case, you'll be able to get more -enemy cold resist on those gloves, which makes killing bosses easier with Frostclaw totem. However, as stated above it's hard to get that stat. So think for yourself what you need and want. If you don't care about the -enemy cold resist, only watch out for a good +minion life roll.
You can still shrine craft it with magical shrine and bless it with the same shrine afterwards regardless of whether you rerolled the item to ilevel 1 or not.
Mo' it with minion life (like all the time already anyway) and the rest with cold spell damage. (You get already enough minion resist when your crafts add up. Minion damage is useless. Magic find is the only other option for better farming)
The best thing you can do is trying out that circlet, since I don't know what your current item in that spot look like atm. Do you notice a difference in your minions survivability? Do you see an increase in damage from howling totems and DFT? Then use it. (Use the same method for other gear). However minion damage is imo useless. The main damage on minions comes from the Crushing blow from Howling totem and from the Rampagor's poison damage. So minion damage... just forget that this stat even exists. You can still improve that circlet later on, so you can still use that and continue crafting another circlet once you find a new one. Small steps are always good. Even small improvements will be noticable.
Just to make it sure: You basically can't do anything wrong with this build at the current stage you're at. If you really struggle hard with a certain uber, sure I'll gladly help you. However, you don't need to ask questions about what's writtin in my guide already. Don't take this as offense. It's simply very time consuming to answer every question you have despite the fact that I already wrote it my guide. And I simply don't have much time lately.
+skills > +necromancer minions > +minion life > cold spell damage > minion resist(until 75%) > Magic find.