Unquestionably, the Blazer is not an efficient weapon. One reason it works well compared to the AC/20 is that they suck for efficiency, too. Looking at the weapons themselves, factoring in your 10 base heat sinks, and a ton of ammo for the autocannon, we get:

AC/20: 14 ton gun + 1 ton ammo = 15 tons. 20 damage / 15 tons = 1.333 points/ton damage. Because we're not breaking the 10 base heat dissipation, more heat sinks aren't needed. If factoring in what's needed to dissipate its 7 heat, your mass raises to 22 tons, for 0.909 points/ton.

Binary Laser Cannon: 9 ton gun -> 1.33 points/ton, but that's not the whole story, because of heat. Including your 10 base heat sinks, your mass jumps to 15 tons, same as the AC/20, but for more range and less damage. Damage/ton drops to 0.8 pts/ton. Factoring the heat sinks needed for the whole gun is just painful if you need to add all 16 heat sinks.

The range differences make for an odd comparison, though, so let's also compare to an AC/10. That's 12 tons base + 1 ton for ammo, for 13 tons total, averaging out 0.769 points/ton, a hair under the blazer, making the blazer actually *more* efficient by a hair when it's your primary heat-generating weapon.

BTW, at this point, should the two blazer discussion threads be merged?