Nightfall Buddy Key?

Ok so, I only have factions and would like to get nightfall but, my computer wouldn't be able to run both. I LOVE my ritualist and elementalist and was wondering, if my friend gave me his buddy key for nightfall, could i use it to get ancient for my rit and istani for my ele? And, would the armor stay there after the buddy key expireres? Thanks!

It should work no problem - as long as you can get to the Bone Palace with your Rit within those 10 hours (which shouldn't be a problem, just don't waste time). My friend did that with a trial key for Factions. While not owning it, we gave him a trial key, and he was able to get Canthan armor for his necro, and still has it to this day.

The only things you would lose is characters you created in Nightfall, and any Nightfall skills you acquired. Items and armor are safe.