If your fascia is angled inward,  meaning the rafter tails are cut 90* with the roof angle,  what method(s) should be done to attach gutters?

Do you pull the whole fascia off and reinstall with angled blocks to make the fascia staright up and down?

Or do you put blocks every so often on the fascia surface so the gutters install straight?

I have looked (but I’ll guess not hard enough) for gutter installation brackets that are for this situation.

TIA

Phil