Aether jumping is significantly easier in mp2 than mp1, because of the physics. If you mess up one aether jump in mp1, then you fall all the way down (unless you're aether jumping at a corner, which is most reliable in mp1), whereas you can pull back into the aether instantly in mp2.
I really don't know what you're asking about since honestly, you're pretty ambiguous. My answer would be, everything besides grapple skip, but there are some even harder tricks in 6% like quadraxis skip without dark suit nor any e-tanks. I don't even know how you would define "reverse order" for mp2 honestly; there are some things you can get completely out of order, but you can't get half of them without dark beam, and so on...
ILS lets you keep missiles, space jump, boost ball, spider ball, and bombs. Re-collecting any of those doesn't really do anything. Even without ILS, there are some fun sequence breaks you can mess with (cheese jump guardian, early boost ball, etc). So you can practically have two different walkthroughs, one with ILS and one without ILS...
I really don't know what you're asking about since honestly, you're pretty ambiguous. My answer would be, everything besides grapple skip, but there are some even harder tricks in 6% like quadraxis skip without dark suit nor any e-tanks. I don't even know how you would define "reverse order" for mp2 honestly; there are some things you can get completely out of order, but you can't get half of them without dark beam, and so on...
ILS lets you keep missiles, space jump, boost ball, spider ball, and bombs. Re-collecting any of those doesn't really do anything. Even without ILS, there are some fun sequence breaks you can mess with (cheese jump guardian, early boost ball, etc). So you can practically have two different walkthroughs, one with ILS and one without ILS...