That's easy. Use lgp/unlgp or lgptools to extract all from battle.lgp to some empty folder. Now look at the files in AC Cloud you have rtck-rtcz are weapons, just copy the weapons you wanna have from AC Cloud model into folder you extracted battle.lgp, then use lgp/unlgp or lgptools to create new battle.lgp from that folder. You could use replace in lgptools to do it faster(by opening battle.lgp and replacing rt*ck-cz with the weapon you want), but I find it a little buggy. Ah and you don't need to replace same weapon you want to add, you can rename the file with the weapon of your choice to change different weapon(for example - "loved" by everyone - nailbat) then tweek it's stats for your liking with WallMarket. To find which exactly ck-cz is what weapon you can look on Wiki, open the kernel.bin with wallmarket or for example opening model in Kimera or Biturn. Anyway it's simple rtck is first weapon rtcz last:P.
You can save that folder and mix stuff from different weapon/model packs untill you have all you want. For example when TA Cloud will be released you can just add this model without weapon files and get TA Cloud with AC weapon/s.