Final suspension bolt tightening

Actually a lot of that is overkill. The only thing that really has to be torqued on the ground with the ride height set is the lower control arm pivot nuts, and only if you’re using OE style rubber bushings. The pivots don’t move (torqued to like 90 ft lbs) so the entire up/down movement of the LCA is dependent on the give in the rubber bush. The bushing doesn’t spin in the shells or on the pivot, and it will tear of its not tightened at ride height or in the middle of the range of travel. Tightened at full extension it won't have enough give to go to full compression without tearing that bushing.

All of those other pivot points have bushings that spin on a bolt. The UCA bushings rotate around the UCA eccentric bolt, they don’t depend on the flex in the rubber to rotate. Upper shock mount is just sandwiched, the lower rotates on the bolt. The leaf spring shackles would benefit from being tightened with weight on them, but tightening them in the air won’t usually cause catastrophic failure of the bushings if they were just installed. If they’re old and stuck to the shackle bolts they might fail, but if they’re that stuck they’d probably fail when they were disassembled before they failed on re-tightening.

And if you use poly or Delrin LCA bushings you can even tighten the LCA pivots nuts in the air, the poly and Delrin bushings spin on the pivots.