Considering how little of a threat the Nether is in the pack, the Angel Ring should likely be gated behind more than just XU2's GP mill progression line. It might be a good idea to do some gating of XU2 stuff in general, Considering the Jetpack is gated behind all that Mekanism is gated behind, maybe make one of the rings require it, or maybe each ring should require one of the jetpacks from the various mods that add them (ProjectRed, IC2, Mekanism). Though considering the Chicken Ring is more of a glider, maybe it should require the OpenBlocks glider. making each ring require OpenBlocks, IC2, then Mekanism in that order.
Considering how little of a threat the Nether is in the pack, the Angel Ring should likely be gated behind more than just XU2's GP mill progression line. It might be a good idea to do some gating of XU2 stuff in general, Considering the Jetpack is gated behind all that Mekanism is gated behind, maybe make one of the rings require it, or maybe each ring should require one of the jetpacks from the various mods that add them (ProjectRed, IC2, Mekanism). Though considering the Chicken Ring is more of a glider, maybe it should require the OpenBlocks glider. making each ring require OpenBlocks, IC2, then Mekanism in that order.