I like to recommend Salqiu for avantgarde metal and Pan. Thy. Monium fans but Invisible Music for the Unseen in special is really a must. The presence of the brass instruments and the way everything progresses in long songs in a weird but consistent manner sounds like something which could be written by Remmirath or Pan. Thy. Monium itself. Hands down one of the best avantgarde bm full-lengths this year