Spirit travel

[Durango]

I've not used the skill much on my other characters but my paladin uses it lately and I'm thinking of training more in the skill. I was wondering how much it helps at each level and does it max out at 10 or can you train above and still get further benefit from it?

Currently my paladin has 5 points in it at level 20 and it seems like enough for now. I was considering getting 1 point at each level until level 25. So I'd have 10 at level 25.

I'd like to try some LQing if I hof this character and in the past I've always been a bit hesitant because I'd lose a bunch of xp.