editing out my long post into a new one to update progress:
I have a set of XML files the game uses to generate/validate data, so that should help with staying under the radar.
100% capture rate works fine (thanks for posting it) but be careful capturing any monsters that aren't available in the wild, as it seems to keep track of whether or not it came from an egg and thus might set off a red flag
I've been using loot bonanza for weeks with no issues
Rather than forcing specific breeding outcomes, and risking generating a monster that shouldn't come from the pair, I've forced it to roll the breeding result with the maximum possible valid rarity modifier, as if you had maxed out your chances with sigils and stuff. So far I've had two elites and a rare, with zero sigils used, so it appears to be effective in maximizing your breeding chances without outright forcing a result, saving tons of sigil grinding
I believe I have figured out a way to do the same with egg results to max out the chance for the best gem (diamond) and metal (titanium) type.
Breeding rarity is determined when you initially generate the egg, by breeding the monsters, but metal/gem rarity is not determined until the egg itself has being hatched.
I'm also trying to force wild monsters to be titanium/diamond so farming shards will be easier. I still have to look into determining crystalization results, promotion manipulation, and daily bonus flips.