I'd go for attack range personally. If you really want to move a bit further, get a weapon that has a base move+ stat on it and run through to add 3 movement bills.
The Cosmo Infinity would be the best choice as with 3 movement bills it will give you +5 move and +24 jump. Simply equip that at the start of a move, move to where you need to and then switch back to the weapon you need to use.
You only switch if you desperately need the movement range though and you wouldn't need to do it that often, if at all but it's a better alternative than using movement on a weapon you'll use since attack range will be more useful overall.
Valkyria Chronicles is the best RPG this gen! Official Ultimecia of the Dissidia 012: Duodecim boards