you mean the custom game mode Ultimate Bravery?
yeah no, that mode can be very frustrating. plus I'm not entirely sure they can build a system for that kind of game mode to work with League on its own, given how many matches are going on at any given time.
https://ultimate-bravery.net/
that's the site you can use to get your rng champion, build runes, summoner's spells, etc. and it even has a list of rules to follow
there are some variant rules that can be added in for a bit of extra challenge
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3's a party. Limit how many players can be in this custom game for each team. 3v3 should be the max. This means one person mid, and then duo bot lane for each side. It contains the nonsense...or creates more. We're not entirely sure.
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Abandoned Top Lane. No one can go Top Lane until the Inhibitor Tower is under attack, and only then can you defend it. No pushing the wave up.
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Quiet Jungle. No Jungling of any kind. Even if you get stuck with Smite and have to build a Jungle starter item. That means camps, buffs, dragons, rift, and scuttle crabs remain intact at all times.
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Owned Only. You can only use champions you own (free rotational champions can be allowed at the choice of the combatants).
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No Dessert. That item build you have. Build it in order, one at a time. That means until your first item is fully built, you can't start working on your second item. You may build towards each item in your list. Example; If you have Guardian Angel in your rng build, you can buy; 
and 
to make it cheaper/easier.
