Let me know where you would like Claire and her group to go next on the ship or if you want to split from the group, or just want to skip past stuff.

As for Blythe, there aren't many places in the ship that are 'high', since it's like a multi-story building with the floors all relatively low.  The only places that are high would be the hangar because they need to stand the cogs up in it, the Cadmus Reactor Bay for the same reason to accommodate cogs, and the Tachyon Harp Chamber because the hyperdrive core is fairly large for a ship this size, tho it is more long than tall, it does have some pretty high catwalks.  If Blythe is in any of these rooms I can describe them to you.  If she's in the hangar, it's also likely that Mike will run into her while running maintenance on the cogs, so that's an interaction you can RP if you would like.

Not exactly a 'high' place, but the place with the greatest elevation, AKA the top floor, is the Bridge, where Captain Hargreaves controls the ship.