i love barends. but i only use them with my flat shoulder pinchers for a few reasons.
1. a wide riser helps with climbing in much the same way barends do. who knew?
2. wide risers are allready a liability when it comes to clearance. and if you have ever snagged a barend at speed, you know that it yields an epic butt screwing stack.
3. i have had barends attached to wide risers and when i get up and honk on them there is alot of flex in the bar and stem.