DiCanio, Christian T.. The Phonetics of Register in Takhian Thong Chong. 2007.
Hopefully this is the right glottocode - it's a little unclear.
Since cɕ appears in place of cʰ, we assume c should be given as ȶ.
The breathy-creaky (breathy-tense) series is realized as initially breathy, then tense.