From the East gate of Lirath, 8e, se, e, n, 3ne, n, 2e, 2n, e, ne, 2e, se, s, e, portal, 5e, n, down, 7n, 4ne, 2n, pool
Another method of getting there is by having an Occultist banish you there. However this option often results in the loss of a few items from your inventory.
Most auto-attacking monsters in the abyss are:
chasmes, gibberlings, dragons, vrocks, worms, hezrous, manes, glabrezus.
