Any sword type with a Manuliun blade, paper binding and thaumium handle (you can get away with paper but you better end fights quick). Two extra modifiers and the for the version you use manuliun is the highest base damage at 2 hearts iirc.
Give it one moss and maybe lapis and stack the rest with just quartz. I find moss alone too be adequate for durability as idealy you are ending most fights with a strike with all that quartz. Unless you are perpetually fighting, one level of moss is usually enough to repair your sword between fights.
Really all you need to do is stack quartz.
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Base damage for Many is indeed 2. With ExtraTiC, Enderium takes the lead with 8.