There are a lot of strategies for magic. I find defense to be a good one. Load every likely magic target with void &/or reflect magic and fill in with support, i.e. healers/triage.

This basically just keeps your team alive while the opponent smashes himself against your impenetrable fortress.

Having said that, however, the best magic teams are usually the ones that just lean into it and out magic the other.

Magic attacks with blast are the best way to achieve this, especially in conjunction with snipers and opportunists.

Any thoughts?