Player asks what sub pal to pair with a main Neptious build

The poster's main combat pal is Neptious and they're asking the community what to use as a sub pal. They weigh candidates like the ice-type legendary Frostallion, Jetragon, and an owl-type pal, then note the owl pick may be unnecessary since a flying pal doesn't need to be carried around. For gear, they say they're running a water-attribute setup with an Isis ring, a Neptious talisman, an item they refer to only as "Sea King" (name not fully recalled), and a ring that boosts attack power.