Slide 1
2 and 3 go deep, 1 comes across into the vacated space. Most of the time when slide is called it is because 1 is poached, so they can easily just run to the space to get the disc. If the defense adjusts, they may need to make a cut.
Slide 2
3 and 4 go deep, 2 comes across. Be aware of the 4 's defender poaching into that open spot since the deep throw to 4 is difficult.
Slide 3
Just like slide 2, but reversed
Only difference when coming from the live side (the 3 spot when forced flick) is that it can be helpful to take a step or 2 deep before coming across, in order to make the break window a little larger.
Slide 4
Just like slide 1, but reversed