I'll second the concern with using a floating line under the ice. Floating line is taboo in other forms of technical diving due to the tendency for it to create an entanglement hazard.
Like I said, many things about currently accepted ice diving procedures make me question the validity of those standards in light of the progress made in other technical diving pursuits.
Like I said, many things about currently accepted ice diving procedures make me question the validity of those standards in light of the progress made in other technical diving pursuits.