What are some good end-game LS's and GS's?

I don't have Wyvern Ignition and there's no way in hell i'm getting A ranks in arena for Divine Slasher, are there any alternatives that aren't too far behind these weapons?

Farming for weapon Streamstones for the first time and I've got 4 LS/GS ones and none for my beloved IG, so I'd like to try a LS/GS build