Don't drive into deep puddles if you don't want to get wet. or invest in a dry suit.
or just do a 4 inch lift and save yourself a lot of trouble. Ask the board members who build them, and i am sure that they will be willing to help if you are nice about it.
Sure, t-cases are great, but they are a lot of work for something that works fine. when you get some money together, just invest in a dual range 5 speed. that combined with your EA-81 it is like having a T-case, but with a lot less work. One eye has that setup and it works great. I can think of one instance where everyone who tried a particular hillclimb broke axles, including a t-cased rig EXCEPT one eye. And with the T-case, you will still break stuff; its part of the deal