Keeping in mind all of this damage is delivered in just 6 turns of the 12 turn benchmark, the numbers are impressive. Ammo limitations never come into play, and the HBK-4G could continue to deliver an ACD of roughly 18 points/turn for another four turns if required.
Considering that any critical hit to the left torso has a 100% chance of destroying the mech (assuming the Hunchback has not consumed more than 5 rounds of ammunition), this is a major weakness: one that should be exploited when facing the Hunchback, and one that should be protected if commanding it.
The Hunchback chassis is powered by a small engine, with a top speed of 64.8 kph. It has no jump jets, and is often outpaced by most medium and some heavy mechs. Because the HBK-4G has no long range weaponry, it is imperative to use cover to the Hunchback's advantage, maintaining top speed whenever possible, to maximize the modifiers against incoming fire. Dense terrain, such a heavy woods or a steep hill, combined with even a minor directional change can impact the survivability of the Hunchback and should be avoided when possible - even if this means the entire lance needs to reposition.
From a damage perspective, the Hunchback is an excellent strike mech, however weak rear armor and a low top speed can cause a plethora of problems for this medium mech - and the AC/20 on such a small mech is going to be a fire-magnet. Still, the 4G is extremely heat tolerant, and can dish out an incredible amount of damage in a short period of time. If the mech is positioned correctly with the right support system, it can devastate the opposition.
The HBK is tough enough to play this role, but lacks any weaponry that is capable beyond 12". The HBK-4H variant would be a better fit in this role.
The HBK is completely incapable of playing any sort of fire support role in this configuration. Look to the HBK-4J for more long range firepower.
The HBK-4G is a brawler through-and-through, to the point where it may be considered a one-trick pony. It thrives in urban environments, and other terrain-rich biomes that allow it to close into optimal range mostly unharmed. As long as pilots are conscious of keeping enemies out of their rear arc during a scrap, the Hunchback will not disappoint.
The HBK-4G is purpose built, and ready for action. The Hunchback chassis also has a variety of variants (-4H, -4J, -4P) that play other niche roles. The best modification involves removing 1/16th ton from each arm, and redistributing to the rear side torsos. In this way, each of the rear segments can at least withstand a single medium laser hit before seeing any risk of internal damage. This change would have no effect on the defensive benchmark, as the simulation assumes the two mechs are always facing each other, but would most certainly impact the Hunchback's survivability in a point-blank engagement.