Notification for Phase 3 (small and mid-sized Wikipedias) will rely heavily on Tech/News. However, there are six Wikipedias in Phase 3 that don't have the Reply tool enabled by default already and did have more than 1,000 active registered editors last month: trwiki, svwiki, fiwiki, nowiki, cawiki, and simplewiki. The English Wiktionary also fits the criteria. I plan to post an extra notice this week at those wikis.