Also like Morwen I've not been incursioning for a bit, but TVP was "the" shield incursion channel when I left.
The estimate I handed another friend who was looking to get back into the game was that at 3 hours per evening, they could expect to produce around 120m to 180m (discounting LPs). This is based on waiting roughly 1 hour to get into a fleet after you log on, followed by running 2-3 plexes an hour for the remaining 2 hours. Obviously, this rate is subject to shift - on some nights I managed to slip in after only 20 minutes of waiting; on others, it took me over an hour before I managed to get a spot in.