The required Nihil faction level is between Kindly and Warmly.
Initially with Kindly faction Dramudi would not respond to me or accept the statue. After many kills (50-100?), he still conned Kindly but when hailed responded that he noticed my Statue, etc, etc. Faction was still not warmly when he began to recognize me. Just keep killing Noc, Kyv, Ukun, Mastruq, Ra'tuk in Barindu and other GoD zones and he'll eventually respond after you've been kindly a while.