They need patience.
They have casual hours.
= It’s going to be taking them multiple weeks to do it, which means they’ll likely vaulted their way up to/past 220 by the time they time every single 15 key given how much sooner you can fail to time a +10 (and get your first 220) than you can time 8 unique +15s.
Which means the valour system isn’t giving them progression, it’s just mitigating RNG screw.
Which is exactly my point. It’s not a casual system, it’s just general bad luck protection against screwy vaults.