Golden Temple Question

How do you get to the higher level mobs? When I went it only listed low level mobs to get into.

There is a mirror version of the Golden Temple town. You get to it by some portal, I think it was on the rightmost part of the city. In this mirrored version you talk to same NPC but the mobs will be the high level versions.

There should be a portal in the main map that takes you to another golden temple with higher lvl mobs.

Just go to the far right you'll see a hidden portal on the right side of the last npc. after Ravana's portal.