Will Heart of the Lion (mage armor) count as medable armor when stealthing with 60 skill?
Any item that has the "Mage Armor" mod (and hence is normally un-meddable) counts the same as leather or no armor at all when it comes to stealthing, imposing zero penalty. It doesn't matter what the original armor type was; studded leather (the only type for which a "lesser" penalty is applied when stealthing) is cut to zero penalty just as plate is.
Shadowstrike is implemented and fully operational on demise? What will make this move more successfull? Uoguide says if successful it hides attacker. Does that mean just a hit or could a hit not trigger it? Don't u have to be like 5 tiles from combat to succesfully hide? How does this play into the move? Is there a cooldown to this move?
Shadowstrike pretty much removes any and all of the limitations for hiding. Any successful hit using that move will immediately hide you: you can be in the middle of combat (it will yank you out of war mode and remove your "in-combat" flag) right next to anything, and there's no cooldown restricting it whatsoever.
Ninjas should be elf for dificulty to track?
Well, that depends on how likely you think others will be using the tracking skill on you. Note that this bonus does not make an elf any harder to DETECT, just TRACK.
The chance it hides you is based on your hiding skill, so at gm it will always work.
Actually, successfuly landing a blow with
Shadowstrike will invariably hide you, no matter what. It's technically possible (through soulstones) to use it at 0 hiding. Of course, you wouldn't be able to stealth and walk away with less than 30.0 hiding...
The move doesn't work by making any hiding checks at all; it simply hard-sets the "hidden" flag on the user.