Well in 2 hours my node has gone from between 28 and 45 to between 32 and 64... So yeah it does increase it.
No you can't get that big(well you could but it'll literally take forever) each "zap" has a 1/(however much the bully node has of that aspect) chance of granting the bully node an extra point. So at 50 vis in your big node you have a 2% chance of gaining the point, at 100 only 1% and so on. The Time Torches only increase the amount of zaps.
EDIT: they DRAMATICALLY increase the amount of zaps
EDIT:
View attachment 17884
The set up if anyone is interested out there, each torch set to 3x3x3 and 400%. Need the torches on the corners so the outside nodes recharge quicker or else they're just sucked dry.