| Rhedyn |
I discovered that the most effective buff spell is summoning creatures that pick up and place martials in full attack range.
We ended a campaign recently and I was using time stop to summon trumpet archons who flew around healing or moving martials, and by martial I mean anyone who wants to full attack.
Between that and the arcanist counterspelling the BBEG melted. We played at 20th level for 4 whole rounds against a boss with 5 final Fantasy like forms.