Windwalk, as it was in WC3, is basically invisibility+muffle+backstab (sneak perk). You can probably manage it without using mods. Not sure about earthquake (maybe work from Fire Storm?). Reincarnation could be like the Avoid Death restoration perk, but triggered by "death", of that's possible. If we're going by the WC3 version, then it would have a cooldown (Avoid Death's is 24 in-game hours, so that could work), or if you're going by old-school WoW, then a reagent would be needed. If you're fine with Avoid Death as-is, then that's another you can cover without mods. Blink (the WoW version, since the WC3 version wouldn't be feasible) is basically just the Vampire Lord ability Bats, with a different animation (perhaps the invisibility "flash" at the beginning and ending points). As for mirror image, you might look to see if anyone's done work enabling the "Spectral Clone" shout that the Greybeards have you test Unrelenting Force on. I know that the sound files for it exist, but it was never implemented.