Here's a thought: If a 51% attack were to occur on Zencash like it did on Bitcoingold (same Equihash algo), if the same attacker or someone else with huge Equihash hash power decided to target Zencash, where would the secure nodes come in? Would they prevent such an attack, make an attack harder/more expensive to execute or not at all?

Would the new update in July with increased block rewards for secure nodes and the introduction of super nodes add more security to the network? If so, in what way?

Very curious about this. Thank you