You can't put Unbreaking on a sword in vanilla period as that is a tool enchantment. I think you can only get Repair on it since it is a Thaumcraft item. Smite, Bane, and Sharpness are also mutually exclusive as they are damage mods. Disjunction has no restriction the same with Vorpal. I have a Sword of the Zephyr with Sharpness V, Repair II, Disjunction III, Vorpal II, Looting II. The sword is a beast.
Keep in mind that Repair won't work on a diamond sword, and the Uncrafting Table no longer will allow for unfitting enchantments to be transfered to new items.(so even if you had a beast of a sword with Repair and wanted to put that on a diamond sword, you're SOL because the enchant won't work on a non-thaumcraft tool, and the Uncrafting Table respects that you can only apply Repair to Thaumcraft tools now, and yes, that patch is in the version of Twilight Forest in the modpacks now)The following are all enchantments and their max levels that can be put on a sword of the zephyr or thaumium sword. If you use a thaumium sword, you can uncraft it into diamond and have a repair diamond sword.
sharpness 5
unbreaking 3
repair 2
vorpal 4
fire aspect 2
knockback 4 (I think)
disjunction erm.... 5. something like that..
and looting 3
Keep in mind that Repair won't work on a diamond sword, and the Uncrafting Table no longer will allow for unfitting enchantments to be transfered to new items.(so even if you had a beast of a sword with Repair and wanted to put that on a diamond sword, you're SOL because the enchant won't work on a non-thaumcraft tool, and the Uncrafting Table respects that you can only apply Repair to Thaumcraft tools now, and yes, that patch is in the version of Twilight Forest in the modpacks now)
They patched that?! NOOOO now I can't make fluffyKeep in mind that Repair won't work on a diamond sword, and the Uncrafting Table no longer will allow for unfitting enchantments to be transfered to new items.(so even if you had a beast of a sword with Repair and wanted to put that on a diamond sword, you're SOL because the enchant won't work on a non-thaumcraft tool, and the Uncrafting Table respects that you can only apply Repair to Thaumcraft tools now, and yes, that patch is in the version of Twilight Forest in the modpacks now)
Even better is getting a insanely enchanted Magicbane, a crapload of glowstone dust, and a touchstone of midas. Thaumcraft's got nothing on a athame which gets stronger as you enchant it. BRB going to strip the lag from my install somehow and kill the wither with my "Omnicide Athame".And to be honest leaving it thaum does not really mater with all those enchants you will one shot most things.
I am 100% sure that if you use books you can get repair and unbreaking on the same thaumcraft sword, in any order.Sorry, but DW lied to you. He's using that lie to cover up how he keeps showing up with repair and unbreaking together, he uses creative, but to maintain the illusion of his show, he does not speak of it.