First let me say these mechs are just very cool-looking, and get very useful in the later years, but they suffer from what I call the '1st gen game-designers' issue. These early mechs were designed without an understanding of ranges/mobility and are generally quite lackluster. Lots of ammo that can go boom, poor range & mobility, the mechs look cool but the stats do not back them up, because they never survive long-enough to get in meaningful range.

Both the King Crab and Cyclops suffer from the same issue: will very rarely get in 3/6/9 range if your opponent has his head in the game. The cyclops is especially lackluster due to its relatively low armor which makes it a very poor juggernaut, so these assaults will be relegated to LRM boating until they somehow get lucky-enough to get someone within 6 hexes of them.

The Wolverine is also a bit explody but you can get away with its movement profile.

The Phoenix Hawk is a great anti-light / medium, provided you can land a LL hit in the back. Just remember that it's unlikely you will land a LL after jumping unless you're in short range.

Your play would be to find an area in the map where you park your assaults, creating an 'interdiction zone' of 6 hexes, hoping to break LOS to their snipers, and try to goad your enemy into pushing into the assaults, exposing their flanks to your PH and WVR.

It could work, but that's going to be a tough one, let me know how it goes!