tbh on bismarck you should just aspected helios (diurnal stance ofc, don't use nocturnal ever) before everybody jumps on the back and then you dps the carapace/corona and it would be enough.

I only did it with WHM (so we had both Medica 2 and A. Helios up) but i guess it works the same with a scholar since he can just spread his adloqium (spelling ?) on everyone.