5/5 unlocked for this weaponskill and using strength build i was doing 1000-1450 almost every time with spike dmg weaponskills at 2500 about every 10 weaponskills inside dynamis on ep mobs. Rampage was doing 800-1500 with spike dmg around 2k on same mobs. The 5/5 was unlocked in an afternoon, so I believe it was worth it. The consistency of the dot makes it worth it to me. Now i will try to get the best ws setup and do some more test with different gear swaps.