Here's my thoughts, and you can take them for what they cost you.
Lenny's rig weighs 3K# or so. That's really the prime reason for stickies. Some rigs are so light that they have trouble putting the rubber to the ground. That's where the stickies are primo. Daryl's stickies do him little good on a 6K# vehicle (plus Irok stickies aren't much of a step up from regular compound).
Based on the little breakage he has, I think you could do flanges or hubs - whatever you'd like. The problem is that you MUST replace the hub gears to the tune of ~$130
TOYOTA INNER HUB GEAR - Longfield Super Axles in order to prevent a strippage of the splines on the Longs (Bobby won't warranty spline strippage). And, you'll probably never unlock them. When you hit the street, if you put it in 2WD rear, you're not putting power to the diff, and therefore the Aussie SHOULD allow differential action, correct? So, unlocking the hubs really would only be necessary if you're worried about wear-n-tear on Birfs/Longs or fuel consumption (less rotating drag in axle). I doubt you'll drive enough on the street WITH STICKIES to be concerned with either of those.
Like others have said, despite being so light, stickies are stickies, and you will wear through them quickly on the street. UNLESS you travel only in a straight line and do not accelerate or decelerate at all. Take that as a challenge
Lenny, up to you, mayne. I'm in the same boat when it comes to advice. I kinda like to do what I wanna do and let people say, "told ya so," or the rare occasion I get to say it.
Me personally, I'd run the flanges and be done with it.
4340 CHROMOLY TOYOTA DRIVE FLANGE - Longfield Super Axles
If you do the locking hubs, you'll probably wanna get the ARP hub studs, too.