The LR diff is a non-hypoid design, so gear set choices are poor (and expensive). If you get much higher than a 4.10, the ratio of teeth between ring gear and pinion make them weak by design. Factory half shafts are not the best either. You would need to go to an aftermarket shaft as well (more money).
The aftermarket shafts are not a suprise. i was planning on replacing them anyway. im not familiar with the stregnth of non hypoid differentials. I'm planning on running a 4.11 ratio or something close. should i just look for yota axles ?
You are still headed the wrong direction with yota axles if you want rear steer. You are going to need a dana 60 minimum. full 35 spline, big joints and preferably with aftermarket knuckles and Cs. Yota axles are just barely up to the job of dealing with 39" tires in a normal front steer only setup, with all the bells and whistles thrown at them.