At the end, destruction is the premier Eve isk raiding spec for endgame raiding, once you've achieved the required gear from medium-level raid bosses you'll find that it pulls away from affliction for overall DPS. For our part, destruction is a viable choice of build for Arena/battlegrounds. Affliction is the build we see most commonly either with leveling warlocks or those who chose to run the arena route having completed the leveling grind. It presents an interesting and wildly powerful survivability strategy when combined with demonology for soul link.