There's a lot of variables to take in to considerations here. Because the IFS pivots, when you raise the truck, the track width does decrease. The factory tire is a 285, will not gain any track with by replacing with the same width tire. Keep in mind, when referring to track width, you have to multiple your offset by two because your scrub radius is for one wheel only. If you switch to a 25mm offset from your current 60mm offset, assuming you stick with a 8" width wheel, you will be gaining nearly three inches of track width.
I am approximately on the same amount of lift, and I am running 285/70r17 on Method MR701. They are 8.5" wide, and have 0 offset. Per the calculator, I am at +58mm scrub, and that is taking no considerations for the decrease in track width due to lift. I can tell you, my handling is not affected by the scrub. The truck feels like a locomotive on tracks, and I have not suffered a noticeable penalty in parking lot maneuvers. It performs really well on the trails because I have a broader base which was the over all goal.
The one issue I am having is increased wear on the outside shoulders of the front tires. My alignment is near perfect, so that isn't the cause. The conclusion I have drawn, is because the front drive axle IS ACTIVE, when turning, more pressure is applied to the outside shoulder as it is actively engaging the pavement. I do have intentions to find a wheel with +25mm offset. It should reduce the rate of wear, but I still expect a higher rate of wear nonetheless.
