standing still: first time just the green circles, second time correct cast.
pala moves 10 yards forward, mages stay at original position: blizzard at pala's first location
whole team moves 100 yards: out of range (trying to cast at previous location obviously)

been testing this in redridge mountains, at various locations

edit: found a solution: put the paladin's macro on a different keybind, press it and then use the blizz macro.