User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4405022-20130224224515/@comment-5774152-20130228161917

Why would they split up? That's not a very good idea. Remember when we were in Percy's POV, and he was talking about how splitting up to fight the twin giants wasn't working well for them. He said Hera made them a team of seven for a reason. Then they fought the giants working as one, and defeated them (well Bacchus killed them actually but they did all the work).

Another example: When Leo, Hazel, and Frank were trapped underground, Gaea appeared to them and told them that her plan was to split them up, hinting that they are stronger together.