Oops, my mistake Yossar! I don't know why I'm hung up on Productivity today.
So, for the Blue Dragon, I have 9 Water, 1
Order (it will sink in eventually, I hope)
, 1 Magic, 1 Luck, 6 Dominion. With that build, the Watchtower is the only choice. Would you cut back on Order to get the Mausoleum or keep Order and live with the Watchtower?