For all vocations it is wise to use a Helmet of the Deep since this will lower/block the Water Explosion damage. Mages: Use Magic Shield and kill with SD as fast as you can, or you will be dead very quickly. May be a good idea to use 1-3 SSA to make your mana last longer. Knights: Melee and Exori trying to keep your HP constantly full. Paladins: Use a Shield and Ethereal Spear, bring plenty UHs.