[octatonic]

I sequence/grid everything first, but then work with a drummer is exceptional.
He likes to work to a click but is very good at drifting around the click.

Then I mute all the sequences and re-record all the guitars/bass etc with click off.
Then manually play the sequenced material into the computer in free time.

It is a lot of work, but the natural drift of the drummer is great for feeding off.

I also give him 'free bars' to do whatever he likes.
Then I'll sometimes write around his parts.
It is an inspiring way to create.