Solo'd with ease as a 61SMN/WHM Hume.
After duo leveling as my DRG with my roomie I set my HP in Rabao, switched to WHM and teleported to Holla. Hoofed it over to San d'Oria, switched back to DRG to flag the quest then used Warp to head back to Rabao. Gathered my gear and then switched to SMN, went outside, grabbed Refresh from the Field Manual out there and headed for the spawn point. When I arrived put up Sneak and summoned Carbuncle but not before killing a mob that was too close in case of link.
Anyway, I popped him, sent Carby after the oversized bug and went to work. Let Carby chip away a little, ran back, released then summoned Fenrir. Let Fenrir chew on the bug for awhile until ran low on MP. Released Fenrir, then switched to Carbuncle. Around 39% it threw up Invincible and started using Cure III. After its 2HR wore Carbuncle resumed chipping away at its life. Around 20% I resummoned Fenrir again and let him finish the bug off. Ran back, grabbed my stone and now on my way to get my lance. Overall it took about 30-45 minutes between the running around and the fight. Took maybe 10-15 minutes or less to take down the ant.
