The nickel copper ratio is the key here. It is basically related...

The nickel copper ratio is the key here. It is basically related to the original magma the sulphides are derived from . Nova seems to be about 2.5:1 Ni:Cu. This is typical of a mafic/ gabbroic system. Actually the grades seem very similar to the high grade parts of the Lynn Lake deposits in Manitoba. The discovery hole there ran 160m @ 4.5% Ni and 1.5% Cu. It was effectively a down dip hole in a glacially truncated pipe -  Nova looks like something similar only a bit more mashed about by deformation and metamophism , laid on its side and potentially much bigger.

I think you could already replicate that best hole at Lynn Lake by drilling down plunge in the known Nova system.

Btw the nickel grades here ( I suspect up to 7 or 8%) are exceptional for a system with such a good copper content. Normally the ratio is similar but the overall grades are a fair bit lower.