Shhh. Don't tell anyone, this is a deep, dark, well kept secret. You can use any increase you wish to use. Pick one and if you like the way it looks, use it, be consistent. Do you have a specific one in mind in case some adjustment might be needed? I probably won't know about that but someone else will.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper