Thanks for the info.
As of right now, for heroes available in two Elite Campaign nodes, players can expect to get 93-94 hero chips from those two nodes every four weeks. It currently costs 120 hero chips just to keep a hero’s red skill maxed with each new cap raise, a cost that increases steadily with time; before long, it’ll cost more than the 140 chips that can be farmed every four weeks for heroes in three Elite Campaign nodes. And that’s just to keep pace with the cap raises; if you’re new to the game or trying to work on a hero you’ve neglected before, you can utterly forget about getting enough chips from Elite Campaign to get a skill to the max level.
And yes, it is possible to spend 20 diamonds to reset each node and get more chips; that still means, for 2-node heroes, players would be spending 1200 diamonds per month in order to get enough chips to max a hero’s red skill after farming for a year or so, depending on how many chips they get from other sources.
Diamond crates have a drop rate of 32% for Hero Chips (usually 1-4 chips, IIRC) and 20% for a full hero (or 7, 18, or 30 chips if a player already has that hero). Given how few heroes most players can afford to work on and try to maximize red skills for, I’d say maybe 10% of those drops are actually usable. Changing the “full hero” drop quantity to a flat 20 chips, as Musketeer suggested, would help greatly, but even then I think we’d need to see a significant increase in the amound of Diamond crates awarded in contests, Weekly Quest rewards, etc. if they’re going to be a major source of hero chips.