Wife and I are mid 30s and both in KiwiSaver.

Have own home, a rental property, around 150k combined in KiwiSaver and 20k in a managed index fund.

So all up 170k in index funds across 3x accounts. They are all invested into Superlife TWF total world fund with from memory 8000+ companies invested in.

In lieu of the previous comments is there any reason to invest some of this into NZX50 indexes instead?