Most of the crank Pushers I know use 2oz weights most of the time, but 3oz & 4oz weights are not out of the question (as long as the rod can handle the weight).
The charts are set on line angle at 45deg & add a foot of depth for the crank ... but I don't know if they state a set length of leader line between the weight & crank. Some use 5' leaders & some only 3' leaders.
I measure how much line I have out (line counter reels) by getting up to speed & putting the rod in the holder with the weight at the surface ... zero out the reel & then let out the line. Rod tips are set about 1' from surface, but that's nullified by the diving depth of the crank below the depth of the weight (or close, anyway). A 45deg angle is hard to get @ 1.8mph, but it's still how I calculate how deep my cranks are running. I calculate that every 5ft of line I let out will equal 3ft of depth. (so 20' of line out is 12ft of depth)
If I have to fine tune the depth, then I multiply the length of line out by 0.6 ... so 20' of line out x 0.6 = 12ft of depth or 25' of line out x 0.6 = 15ft of depth. But if I need the crank to be at 14ft of depth, I'd reel back to around 22-23' of line out. It's basically a ball park guesstimate in any event, but you can always experiment on the fly.
One little tip I learned from M R Dux, back at one of our Spring Flings, is when you run across a school of fish when you're going in one direction & maybe not have any hits ... hit the school from the opposite direction. Worked for me & I was Pushing jigs at the time.