Help with rounding out my crypto portfolio?

[Bramen]

I believe I have built a fairly well-rounded crypto portfolio in the past month or so. I'm looking for 2-5 more cryptos to further diversify, preferably ones which have low covariance to what I already hold, and different feature sets.

Strategy is to buy and hold, and increase my positions monthly using cost averaging. I do not day trade.

I currently hold the following cryptos:
BTC
LTC
ETH
WAVES
XMR
DASH
BCH
XRP
STRAT
LSK
GNT
SC

And here is my shortlist to add in the future:
OMG
NEO
IOT
CVC

All are near their all-time highs, so not an optimal time to buy. How would you prioritize the above, or would you add anything to the list?