Hello.
1) Sorry I can't tell. Guys in the facebook group know that my Windows is quite outdated.
2) Basic animations are 01_hero and 01_hero_4_combat. The first is used for menu, standing, running, flying animations. The second have powers and combos animations.
For common moves like ground and jump attacks each hero have the fightstyle_default animation set, indicated in the herostat.
That's what you can change to add the 3rd animation. Copy one animation set you want, and rename it in like fightsyle_hero (notice that the word hero stands for the name of the character you want). Then you need to add the fightstyle_hero to the herostat, talent, fightsyle and the packages data files. Use any mod with 3 animations for example, decompile those 4 data files (herostat, talent file, fightstyle and packages) to look inside.
3) I have tried to use that Dr. Strange animation before, but it's impossible for some reason. You can find it listed in the common_anims data file as anim32 or something.