Pricy, but works flawlessly, will last forever: EVT Mulfinger
https://www.efficientvelo.com/tools/...e-loading-tool
Also available on amazon prime.
And Park Tool now makes the “speed-drive” nipple driver:
https://www.universalcycles.com/shop...s.php?id=70040
I use the Mulfinger for lacing and the driver for initial tension.