Maybe I don’t understand your question, but your offset is independent of the tire size you choose. It’s a property of the wheel.
Your scrub radius will remain unchanged if you stick with the OEM +34/35 (or whatever I can’t remember) wheels.
You arent going to have any issues clearing your UCA with this setup since the tire is only .5” wider, so the only thing you need to figure out is if a 35” tall tire will not rub with factory ride height. I’m going to assume it will rub, so you will need a 2” (or close to) level to help them clear your crash bars at full lock. Hope this helps.
The only reason to get a different wheel is to change your offset — which you can do with inexpensive spacers too — to accommodate a wider tire, that’s not an issue here.