My current more-or-less completed mono-fliers team. All that's left is to upgrade Subaki and Palla into silver lance+ and killing edge+ respectively but I don't have any of those 5* units. I mean, besides promoting both of them themselves into 5* units, but I'm not swimming in feathers here.

Three reposition users is quite awesome. You have so much mobility, you could even move any of your units into enemy range all the way across the map vertically on the first turn if you wanted to. Having 2 goad fliers is also fun since it adds another layer of depth to strategic positioning. Subaki takes care of my previous problem of not having much of any good way to deal with physically tanky units by being a tank himself and having seal def 3, allowing whatever else ally to swoop in and take the kill. But his -res nature makes him extremely squishy against magic damage. I'm questioning whether Palla's wings of mercy is really doing much but I'll have to experiment more with that.
This team does pretty well and several runs in arena (after getting a decent score with another) showed me that this team has difficulty when there starts being 2 or more ranged units on the enemy team. Bow units are an obvious hazard, but my slower units Hinoka and Subaki are both squishy on res and so not being able to take care of all the ranged units in range leaves a very serious threat of losing a unit the opponent's turn. About the only defensive option is leaving the goad flier units within 2 spaces so they don't get doubled at least. Since the team is all melee units, there's the issue that you can't always get to every unit and yet also stay out of the enemy range. Having three reposition users mitigates that to a great extent, being able to deploy your units and pull them back into safety very well, but the seams start showing when going up against 3 or even 2 ranged units at times (depending on the map). The other great weakness are the maps that have those stupid pillars that my fliers that can move over mountains for some reason can't fly over. The greatest strength of fliers is their ability to ignore most terrain obstacles and not being able to capitalize on that strength gives them another handicap against a tough enemy team.
But all in all, it's a lot of fun to use so if anyone ever gets the opportunity to make it then I wouldn't hesitate to suggest trying it out.