New to Hero's - Can i get help spines/invul build

Ok - i have no idea what im doing.

Travel power? Will i need acrobatics? I was thinking of going SS and getting hasten. Is this advisable?

Fitness pool - Will i need Stamina/Health?

I have no idea how the post level 40 powersets really work as ive only played CoV up until today, so any advice here would be welcomed

Ty for any kind replies :P

Any travel power will be suitable, although if you pick SS I'd suggest getting hover/combat jumping for vertical movement.
Acrobatics is not needed, unyielding does all you need.
Stamina will be necessary, especially if you want to run quills.
Personally I would pick hasten, get dull pain and unstoppable back faster, as well as be able to make better attak chain from spines.

From Spines, everything but barb swipe and confront is worth taking. From invul, most important are Temp. Invul, Dull Pain, Unyielding and Invincibility, as well as unstoppable if it fits your playstyle.

The 40+ powers are called epics, there's 3 pools for scrappers to choose feom, and they act like normal power pools. At 40+ you get to pick powers at 41, 44, 47 and 49.

Most helpful as always Max - ty

if you do take fly, Air Superiority is a brilliant addition to your attack chain.