Well, if you're wanting to use this team for Arena, then you're gonna need a *lot* of merges, so normal Camilla might actually be your best bet in terms of who to put on the team, not to mention her ability to support her teammates.
How far are you trying to go with this team considering it's full of unmerged seasonals?
Well, you can have a fun Arena team while, at the same time, having merges.
Honestly, the only thing I can really tell you (as far as trying your rewards) is to use your favorite non-seasonal 3*/4* units. Kagero is probably the easiest of the 3 to merge (unless you meant her seasonal version). Shigure can appear at 4* and 5* so that's always an option. Tana is a 5* exclusive, so it's a bit harder to get more merges for her.
Since Summer Camilla has hone fliers, she will be your hone carrier and power up bladetome Spring Camilla. If you're worried about bows, you can always run raventome+TA+vantage Spring Camilla and she still benefits from hone buff. I personally built NY Camilla with the slaying edge(spd)+deathblow(swift sparrow now)+galeforce+heavy blade seal set. If she gets hone and 3 goad fliers, that is some insane atk/spd boost. Also don't worry about OG Camilla if she's not optimal. Her weapon refine makes fly emblem more dangerous and she can self goad.
Actually building a usable Camilla it's not expensive, aside from using the effect refine in her prf weapon. Neutral Camilla has 32 spd , +4 from the weapon, and if you add a darting blow she reaches a solid 42, even before a hone or goad. Her attack is kinda middling, but having the hone from summer Camilla it goes into the 'good' territory. Another thing that could be good is fury. It makes her a bit more tanky, which with a fortify/ward, helps a lot. If going with fury, a good old desperation in the B slot would work wonders. Or a hit n run, then reposition her. All of the options above are pretty much budget options! Now, to make it really shine, get a ward fliers. With her prf refine, bam, all the other Camillas nuke things right and left. And no need to be attached, with the range of the skills the positioning options open quite a lot.
I hope this changes your opinion and look at original Camilla in a better light!
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