Welcome in the Enhancement brotherhood
1) I don't know any sites for Enhance that are equivalent of SEaL, it's sad
2) Ring is always good, Helm is BiS on single target fights, for AOE fights go for the chest.
3) I need to check it (I just got the ring yesterday so I have some tests to do), but from what I remember Frostband is never better than AS.
4) Use Stormstrike as much as you can, even without procs, it's much much much better than Lava Lash
5) If the fight is pure ST, use Wolves on CD, it's a great Maelstrom generator. If you have adds to come, wait for them to show up before summoning Wolves. Use Crash lighting on the GCD after you summon them.
6) Use Boulderfist if you don't have SS up and your Maelstrom is below ~80~90. Use Lava Lash above.