My preference is for the following:
15% development and marketing
45% Miners rewards
The reasons are as follow:
This project’s USP is its cutting edge cryptography therefore to keep ahead of the competition we need to maintain a good level of investment in development. The coin is also massively undervalued (in my un-biased opinon ) hence the requirement for marketing. Every zcoin spent on marketing should produce >1 zcoin in return Vs fiat value, therefore it benefits the other 2 groups, miners and znode operators - and the the devs too!
The reason that the Znode reward should be increased is that in future they will provide 2 very useful services to the network; chain locks and insta spend. The first of these will decrease the depandance upon miners to secure the network and the second is not a service that can be provided by miners ergo Znodes deserve an increase in the block reward relative to miners