I am still on my initial 69ml carts. But for me the next ones to buy will be GE, Light Gray, followed by Yellow.
Most likely I will rarely use Matte Black. However I am down to 41% even though I have only printed one print using it. I have more Red,Green than I do Matte Black! So am I doomed to buying another MK cartridge just to keep the MK head unclogged?