I do not expect any response from dev team (well, dev team is out of order anyway), but just want to ask at least community.
What is reason for challenge rifts?
Well - i get the idea at first - it is about (many) “complaints”, about: High paragon players are not so good, they have just BIG paragons. IF i have same amount of them, i can be as high as they are… OR - they had jsut giant luck in drop, if i had same luck…
So, challenge rifts can show skill of different players with same eq/para/build.
And - even more - some players can find joy to play different builds, which they didnt even think about and maybe they will use them too.
Well - not bad idea at all. Why not.
BUT - what we have almost in 90% of cases (at least in EU region) - some troll builds from players, which just making these to have chance to get into challenge rifts pool.
Best way to get into challenge rift pool with your “so called hero”.
1: Forget about cube - at least do not make any weapon passive here! Its basic rule.
2: Equip some random legendaries, or better, leave some slots empty.
3: Make sure, you are not using any spells, which are supported from equipped legendaries!
4: Make sure, you are not using any movement speed skills, legendaries and paragons! Slower hero = higher chance.
5: Distribute your paragons at worst possibility - for example - if your main dmg spell is primary skill, distribute paragon only in reduced resource cost.
6: Do not use gems in weapons and if you do, use amethyst.
7: Do not use follower and if you do, unequip all items from him and do not use any skill from him.
8: Do not use passive for survivability.
9: Make your hero glass (not glass cannon! - only glass). Every mob must be dangerous and be able to one hit you.
10: Do 10000000 rifts with that setup and maybe you will with some luck make one in time.
Now you are on the best way to be choosen for next week challenge rifts.
To be honest - thse stupid builds are not fun, are not reasonable, are not joy to play. Noone will try them ever, noone will even think about try them ever.
So - basic think about challenge rifts is not fullfiled. If you just select some builds from between top 200 and top 500 from leaderboard, it would be better, than choose stupid troll ones.
Just my point of view.