Which direction would you go? If I wanted reliability I'd buy a Corolla.. but we're enthusiasts here and there is no reason to leave will enough alone.
I'd run upgraded T-bars if there is extra weight to carry, decent shocks according to your $$/performance preferences, upper control arms if needed due to wear or alignment issues.
Then no matter where you are you can always swap in any old 100-series upper control arm, shock, t-bar and drive on... coil converted truck not so much. Coil conversion is cool, just not sure it's worth it for most with the dual uniball custom arms, etc. Most Land Cruiser owners are into reliability and the further you get from Toyota the harder it can be to maintain.
If you want to go full SAS, I'd go 3 link and coil overs for sure