Overland sets are pretty top notch on a pet sorc still.
Just due to mothers sorrow and the shadow META. And necropotence being still pretty hard to overlook for a petsorc.
You can also use Crafty Alfiq instead of Necropotence. You lose around 150 magicka, but you keep all the magicka even if your pet dies. Also, it is much cheaper to get in divines trait, compared to Necropotence which is very expensive.
[PC/EU] Tamriel Hero, Stormproof, Grand Master Crafter
Actually, the difference is 590 magicka between craft and necro and that is base, in practice it will be more since that 590 will get boosted by other modifiers