I use a 10G rubbermaid MLT w/ ss braid and batch sparge. I just use Beersmith to calculate all my volumes. When I dump the sparge water from the HLT into the grain bed (after draining my first runnings), it's not very gentle...I also consider HSA a boogeyman. I do use some high-temp tubing on the valve of my MLT into my collection "pots" for dumping into my brew kettle...I'm gentler there.
My steps are basically the below (with Beersmith to calculate my volumes and temps):
1. Crush my grain
2. Heat up strike water about 5° past intended
3. Pre-heat MLT with hot tap water using kitchen sprayer attachment, and then keep lid on it until strike time
4. Empty MLT of other water, drain strike water into MLT, stir, and take temp reading
5. When at desired temp, throw in grain, stir violently so no dough balls, and take another temp reading
6. Drain first runnings after predetermined time (usually 60 min)
7. Dump half my sparge water into the MLT, stir pretty hard, wait 10 minutes for grain bed to settle, drain into pots to dump into BK
8. Dump second half of sparge water into MLT and repeat.