How does the Enhanced Decay (or Enhanced Pestilence for shaman) work at the upper levels where the dot addition is only 2 seconds? Since dots count on the tick, do I need 3 ranks to get another dot tick? Likewise, after I buy the +2 second level, do the next two +2 seconds not do anything extra until I clear another 6 seconds for another tick? Two hundred AA points for another dot tick is expensive, but worth it. Spending 400 to 600 for one more tick is not worth it to me. I haven’t caught my AAs up to that point yet.