And you can (or maybe even should) glue hexwraiths instead of black knights so 160 points instead of 120. So deathrattle is 680 with Neferata or 700 with Manfred.
For me point cost for oversized units is extremely misleading. I suggest you mark them somehow, sometimes there is only 20% models more.
Only dryads in sylvaneth are close to second full unit (but you need to buy a new box anyway).