I like dual frost sets, but I really don't like the fact that they have only 5 attacking units. You are right, its sufficient to kill off frozen units, and of course you have all the essential attackers, but in a battle where the opponent clearly outnumbers your attackers, he or she may unit swap.

I am not saying the formation principle is easy to beat, but it is a recurring weakness. Of course, I have lost to such a set too, so I am just pointing stuff out. I find that in a dropped legends grey battle, an lw just gets me into trouble. I seem to be known for advocating wardless forms (which is not too accurate) but I think with 2 frosts and a furgon, the purpose of an lw is overlapped.

An lw is supposed to deter enemy scouts, knights, and mages, and also provide as an effective barricade or an immobile unit that gives a formation structure. But a furgon can compensate for structure in a much more versatile way, and frost golems are extremely good deterrents, and can even agress. Yes, the mages are a problem, but given their frequency of use (below one or two) in a game between experienced players, the problem will not be encountered often (and you can still paralyze them if they block or something).

In exchange for the much revered LW, you get another attacking unit, I would suggest beastie, personally, which gives you additional range, and a wonderful aggressor.

scout is too vulnerable. I played that, I would be able to flank it to quickly while attacking the scout.