Yes Pulsion 18 has a very good lift and hang time, better than the 15 m and 12m; more speed as well ; overall a better L/D ratio, and far better than the peak; it also relaunches in about 5 knots if it falls properly in the water ;
In very light wind, I also preferably loop in the direction I want to go by pulling the rear line, but there is not a big diffence compared to no loop; making multiple loops is possible but quite tricky due to the size (you need a good balance to stay on the board while the board is sinking) ; you do not gain a lot with several loops, however it allows to be ready to fly very quickly as soon as there is a peak "gust" of 2 seconds during the waterstart trial.
I use 29m lines ; 25m is good if not seeking for marginal winds
PS: I know a guy in France selling one second hand but brand new (1 or 2 sessions only, not adapted to its surfing board, no hydrofoil) ; PM if interested