I dont have a guide, but i can tell you them off the top of my head since i have most...
Timbermaw rep will give you a transmute at honored
- kill timbermaws and do quests available... simple enough
Thorium brotherhood will give you heart of fire transmute at honored
- the only things i had to do were turn in the incendosaur scales, and do the turn in quest for the dark iron residue to honoroed
Argent dawn will give you a transmute at honored
- do cauldron quests/turn in scourgestones to get rep
Zalandarian tribe (living action potions, mageblood potions)
- Rep based, not able to do these ones, so im not sure how the rep works with that
I think thats all ...