Here are my Spriggan rank predictions alongside my ideas for their magics, and who their "main" fight will be with for the arc(Might still have minor fights- Like Ajeel & Erza) ~
1) August. Multiple Magics(He is the King of Magic after all...). It looks like Warrod could fight him, but I don't think that's his main fight, I like the idea of Crime Sorciere coming in as no one except the Saints seem to cover the West, and I also have a pretty loose theory that Jellal's dad IS August, so maybe some heart string pulling?
2) Bloodman / Nienhart / God Serena / Jacob. Bloodman's power could be poisoning people's blood or something crazy like that, to do with blood, I can see Yukino fighting him, and since Mirajane and Lisanna are heading North too, I could see that connection between Yukino and Mira return during a fight, also I want more badass Mira! It's too hard to tell Nienhart's magic already, just spitballing, but maybe since his name is Nine Heart, he might have 9 lives, or maybe some other power which can reflect nine hearts. As for opponents, quite hard to tell at the moment, no one that is fighting at Hargeon has a big signal flashing "NEINHART OPPONENT INCOMING!!!", maybe Wendy & Chelia? Only because there's really no one else I could see them with, but I don't think that will be Neinhart's "main" battle, but you never know, we had Wendy vs Ezel. As for Yuri Drey.*ahem*... God Serena, I have this sneaky suspicion that he might use Lightning Magic? It's almost as if I've seen him use it before..., anyway. Pretty obvious he's fighting Count Hyberion and Wolfywolfhiem, but I do see Gildarts coming in at some point. Hey, Jacob, really like your forehead... ehm.. I mean... I don't know how he assassinates people, maybe by exposing them to the majesty of his skull on his skull. Anyway, he seems to have his eye on Jura, I would actually like to see him assassinated, to strike real fear into people, like "These guys ain't messing around". As for otherwise, idk...
6) Invel / Brandish / Dimaria / Ajeel / Wahl. I actually think that Invel might be a slayer, hopefully an Ice God Slayer, since we haven't seen one of those, he could be a 2nd Gen Ice Dragon Slayer, but I very highly doubt that. As for pairings, I'm quite sure that Gray, Juvia & Lyon are gonna fight him in a joint fight. Brandish.. after this week's chapter, highly doubt she's staying with the Spriggan 12 for much longer, I see Lucy playing the hero and taking down Marin and saving Brandish, then Brandish tells Lucy about what really happened between her & Layla, then Brandish defects to Ishgar's side. I could see Brandish fighting Dimaria as they seem quite friendly, and I would like to see that relationship after Brandish defected. That brings me to Dimaria, who I don't really know what she uses magic-wise, could be an ability similar to Erza's. Anyway, I either see Brandish or Erza facing her. Ajeel seems like the kind of foe that usually gets handed to Natsu, the first male foe, Zancrow, Jackal, etc, but I don't think that will happen due to Natsu's big role in this arc, so maybe someone else, but as far as we're aware, Ajeel is still in the area of the Guild, so that rules out some others that have left to handle the other sides, I think he is also a user of Sand-Maker magic. Finally is Wahl, who I think uses a kind of requip with machines, and it's quite obvious Laxus is after him, so that's quite easy to predict.