Best option is to run many 3500 masternodes and have great chance to receive reward, because higher tiers don't give more rewards than 10 or 30 masternodes of tier1
That is ONLY if you are lucky enough to get Tier 1 MN that actually gets those rewards. The whole MN rewards distribution system is screwed up on this project. Why don't you ask to talk to a developer, no one have ever seen them on discord, they have ZERO activity everywhere. I'm starting to think they used those 0.2 BTC shitcoin developers to fork some cheap failing coin and that's where it ends.