User blog comment:Sakuraiayano/QUESTIONS ABOUT TOWER EVENTS!/@comment-10259858-20140108043600

well, you can check the time on how the tower usually come from the wiki front page (and go to check the event, you can check every single event that is available)

usually, it comes every two months or so (hazy was at 18 september and Ancient japan's got talent was at 28 november), with exception of WWoW and hazy with only few days delay between them.

what usually happen in AGG: one GCQ every months (usually in middle of month), one big event (tower or conquest), SG which usually put to make people have more things to do and Shrine everytime the normal event finished

and about the problem with defense (which some of earlier commenter already answered), you can check if in some case, the GG/WG have defense booster ability like increase the defense or (insert daemon's type) defense

try to look at GG & WG tower calculator to check about the winning rate in case you want to check it