Angami-Pochuri
Angami-Pochuri languages are highly eroded and are all tonal. Marrison's dissertation remains the primary source for most of these languages, and recent quality data is sorely lacking. No reconstruction of Proto-Angami-Pochuri has yet been attempted.
As noted by Coupe (2014), various isoglosses are shared with Central Naga (Ao), but in my opinion, this is due to long-term contact rather than shared genetic inheritance.
Internal classification (Hsiu 2019)
Angamic
Angami, Chokri
Khezha
Mao
Poumai (?) [no data]
Sumic
Sumi
Rengma
Pochuric
Meluri
Ntenyi
Angamic and Sumic may comprise a branch, while Pochuric may actually be a separate branch.
Sources
Marrison, Geoffrey E. 1967. The classification of the Naga languages of North East India. (Doctoral dissertation, University of London
Warning: Forms below are quasi-reconstructions and will need to be fully revised. The following list is meant to be a guide to root / cognate identification; sound correspondences have not yet been worked out.
List of quasi-reconstructions (Hsiu 2018)