Any tips for pure casting?

I’m doing my first Mage build and it’s going great but I’m not sure when to switch staves. I heard the meteorite is good until you can wield Rellanas staff. Also I’m about to do Sellens questline, I’m just getting the stuff ready for it, like having that grace next to the wizard. I’m trying to keep using Moonveil at a minimum and do just casting instead.

I just got to Altus. I’m not too worried about health and like the challenge of having low health, so I’m thinking of finishing with 40.

But yeah, any tips? Should I switch staffs now?