I would tie with a neck, or belly rope, instead of a lead with a hook. The neck or belly rope will help alleviate some of the 'damage' she could do pulling like she is. Possibly tying her with an inner tube to the rail, or post (not sure what you're tying to), so there is additional 'give' there too.
You could also try the Blocker tie ring, but it sounds like she could be one that would simply keep backing up til she let the lead rope loose, some do, and some don't, it would just be worth a try. The blocker tie ring works to help alleviate the clausterphobia that some horses feel, which causes them to suddenly pull back like they do, because it will 'move with them' and not create that solid barrier that a normal lead rope gives.
You could also teach her to ground tie, if she doesn't already (what did you do at the old barn?). I've retrained pullers, and dancers with ground tying exercises; if they want to fidgit around, or pull on me, I can put them to work immediately, relieving that 'tying anxiety'. Eventually I move onto looping the lead over a rail, and acting like the horse is still ground tied. I don't make a fuss, just toss it over the railing, and go on my business; if they pull it off, or dance, I can, again, go back to working their butts, til they realize standing is the much better option...and I work them HARD! If moving around is what they want, then that is what they will get. Eventually what you get is a horse who will stand no matter where you put him, simply because he doesn't want to have to work. However, this method takes more time, just because you have to take more 'steps' to get to the point of tying, but it does work.
Hobbling is another option, but again, may take some time, simply because most horses aren't taught to hobble, so you would have to work with him on that. Hobbling can be beneficial in a pinch, as well, if you have no where to tie if you go somewhere.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."