Tuning reports suggest that we can get a very high amount of fitness out of an RF model. See https://github.com/wiki-ai/wb-vandalism/blob/master/tuning_reports/wikidata.reverted.roc_auc.md
This is now up on staging. See http://ores-staging.wmflabs.org/scores/wikidatawiki/
@yuvipanda, this change got lumped up with a few new things for ORES, so I'll want to have you somewhat close by when I deploy.