To do korinak park your twink on the little hill to the right of his area just at the edge of wall that separates Nagrand and shat and just kite it there on a 50
https://www.wowhead.com/news=244538/guide-to-getting-the-ilvl-requirements-for-heroic-dungeons-610-and-molten-core-h#rarespawns-mail has pretty much all the info you'll need for the wod rares
The rares in talador are phased but they can be done by having a lvl 50 kite them to the edge of the phase then having your twink tag the mob if you cant loot it the drop will be mailed to you
Frost is good for rotting down the enemy team. howling blast hits like a wet noodle but the aoe dot from it will do like 600-800 damage to anyone within range of it
are you doing the assault rares or normal rares?
All good mate, here's some guides to follow.
https://www.wowhead.com/guide=4744/quick-questing-for-the-pillars-of-creation#2...
Did you complete The Tidestone of Golganneth? I just did stormhiem and got my ilvl 50 piece.
The only wod ilvl gear available is rings, neck, cape and offhand.
Ran around wod with a lvl 50 and lvl 10 grouped together killing all the rares we could find.
The lvl 50 got ilvl 48 gear that requires lvl 40 to use.
The lvl 10 got mainly ilvl 14 gear with some ilvl 44 gear.
so some of the rares haven't been fixed yet imo