I personally would use Flamberge if you cant get a good excal. A lot of people underestimate Flamberge. It's a saber type weapon with spirit special. it doesn't 3 hit like excal does but it's still a good alternative since you use UR.
Double Saber is also nice for battle fo. I know that sounds really bad but a hit double saber can do you wonders, it has the geist special on it, restores 100 TP per hit of the special, and with a v502 you're gonna be getting TP back on a single enemy really quickly.
Demons Raygun or Hell Rayguns are a must too, you could spam Restless Lion for some and it wouldn't cost you a dime.
Finally a good slicer. I recommend getting a J-cutter with arrest, those are awesome, but if you dont have the budget for an srank J-Cutter with arrest, then just get an Arrest Diska with hit or a Charge Diska with hit.
I think a lot of people underestimate the common weapons or the lower tier weapons. You dont have to have insanely good god tier event weapons or dark weapons to make a good and effective battle fo.