I'm an Elementalist looking to get the best armor for my class.
If I want the best Aeromancer or Geomancer armor, I go to Marhan's Grotto.
If I want the best Hyrdomancer or Pyromancer armor, I go to The Granite Citadel.
Both of these places are located in the areas gotten to through the Temple of Ages.
1) 15k armour is no better than Droknars (1.5k) armour, it's just shinier and more expensive.
2) Yes that's where you get the 15k Armour. There is also a crafter in the fissure of Woe, which gives a 5th look of armour.
3) The grotto and the citadel are in the southern Shiverpeaks. The temple of Ages has 2 statues in it which sometimes(favour of the gods) lead to the Fissure of Woe and the Underwold (Balthazaar and grenth respectively).
Some pics of myself with a mix of fissure and 15k necrotic dyed black. yea and btw why doesn't anyone post my name when they post a screen shot of me wearing my full fissure set? i think it's kinda disrespectful. I don't like wearing the full set tho, looks kinda queerish heh, so im sticking with this look.