GSBD: Onogoro Island: Eliminate the Invaders (M1 Astray {Jean}, No Respawn, S Rank)
the sixth mission in the Archangel '71' story path and one that is simple to complete but potentially a bit of a pain to S rank due to how much running around you will need to do, SP Generation is important here to let you move quickly and have Hyper Mode/Slow Down ready for key moments while still giving you enough meter to deal with enemies quickly.
The mission starts with the player a good distance from all three groups of three enemies with the two groups to the left of the starting position being three Strike Daggers each and the one that spawns to the far end of the map being three 105 (Sword) units, clear out the Strike Daggers first to give you some meter to use on the 105 (Sword) units as while slow they can inflict decent damage if they land a hit, after the Strike Daggers are cleared out two groups of three enemies will be approaching from far side of the map with the with the set spawning closer to the centre being a 105 (Sword and two Strike Daggers ( didn't see the full unit as my clear path had me shift attention to the next wave but I assume the other group is the same) and killing one of the groups will cause two more to spawn in consisting of two Duel Daggers and a 105 (Launcher) once you clear out most of the current enemies the Sword Calamity Unit 1 spawns in and the whole mission becomes just a bit more irritating if aiming for the S rank, start by drawing the Sword Calamity to one side making sure to leave yourself a path to escape and have your partner use hyper mode and when the Sword Calamity locks on to them move as quickly as you can over to the other side of the battlefield towards the two groups of three that spawned away from it, both groups consist of 105 (Aile) units which aren't too difficult to take out quickly due to lower defence though don't waste time as the Sword Calamity will be done with your partner and be rushing over to you, if you need to use Hyper mode or Slow Motion to clean up any enemies hanging around him before moving to the next two groups of three enemies in the distance.
The group to that spawns closest to the bottom of the map is three 105 (Sword) units while the one likely behind them a little further up is three (Launcher ) units, take out the (Launcher) units first as you might need to drop what you are doing to run away from the Sword Calamity and the 105 (Sword) units are less dangerous if left alive though take them all out if you can.
The next wave appears again on the far side of the map giving you time to make a little space between you and the Sword Calamity, there will be two groups of three enemies again with both consisting of a 105 (Sword) and two Strike Daggers, defeating one of the groups will make the next wave to spawn in, if the Calamity is nearby just head to the newly spawned in enemies on the far end of the map both consisting of two Duel Daggers and a 105 (Launcher) either try and get an the Launcher or use Hyper mode to prevent it from knocking you down as getting caught by the Calamity will make things harder, if it catches up pickoff enough enemies to get the next wave to spawn in which once again is two groups of three across the map giving you something else to deal with away from the Calamity though if you need to get away and the Calamity is healthy you can knock it down with a dash attack to give yourself a head start.
All enemies in this wave are 105 (Aile) units so take out as many as you can before the Calamity closes in before heading to the next wave of enemies that should have spawned in with the group closer to the bottom of the map consisting of three 105 (Sword) Units and the three further to the left being 105 (Launcher ) Units, if the Calamity is too close kite around the (Sword) units before heading and clearing out the (Launcher) group once they are down all that's left is to clear up the remaining enemies and then finish off the Calamity at long last.