Near the town of Bruna, go east, southeast. If you reach The Red Ruby Cave you went too far. You will need to go back west slightly. You should see a shrine, that will once activated, will give you Conjuration points as well as a temporary bound weapon and/or greaves. You can keep activating the shrine every 24 hours. Wait in front of it for 24 hours, then activate it again. Repeat this as many times as desired.

Conjure a skeleton and continue pressing the spell repeatedly while the skeleton is there until you run out of magic. Then, do it all over again.

First, summon a skeleton in an area with no other people around. Repeatedly use Turn Undead on it to quickly raise it.