What is needed is API access to your best run and last run for all dungeons. While raider.io is very useful for forming groups for +20s, the way leaderboards work, it's shit for lower levels.
When I'm trying to bust out a +15 on my alt most of the people applying have 0 score because their realms leaderboard is full of high keys so they never rank in the top 100 and don't get scored.