Magic builds are easier to manage when casting is part of a complete combat loop rather than the only answer to every situation.
Use range to control the pace
Distance can create time for casting and make enemy patterns easier to read.
Manage casting resources deliberately
Do not spend every limited resource on routine enemies if a simpler option works.
Keep a practical backup option
A secondary weapon or low-cost approach gives the build flexibility when casting is awkward.
Do not neglect survivability
Damage and range are less valuable if the build cannot survive pressure once enemies close the distance.