Talk:Sentinels/@comment-90.149.126.157-20130730192644/@comment-71.198.249.170-20130731015956

^ That doesn't answer the OP's question.

As for the slots: Sentinels take two slots (of what kind I myself am unaware of). One way to check to see how many slots you have left for sentinels is to go to the market and only click on one of the three sentinels (not the blueprints, the ones for platinum). Directly underneath the sentinels name is how many slots you have left.