Hey Andrew, why would you want to increase the effective angle of attack at the wingtips? The advantage of flaperons is the ease of installation, but the safer method is definitely the independent installation by forcing the inboard portion of the ring to stall first. The aircraft will be far less likely to tip stall with independent design and you will probably wind up being able to slow it down further on landing...

Then again, you could compromise in the middle and have the ailerons droop slightly as the flaps are deployed, although not to the same extent. I have a custom made prop plane with a setup like this. I can dive it from 100ft up, 100ft out and still land it...

Kelly