And a re-look at the 3039 less obvious Heavies:
-Cataphract: This guy is actually pretty solid. PPC, AC10, 4xMLs (although 2 of them face backwards, but being a 4/6 heavy with no jump jets, they could certainly be useful.), enough heat sinks for continual movement and fire of the heavy guns, and pretty solid armor. Yes, the AC10 could be another PPC and 6 more heat sinks, but as it is, I wouldn't feel bad at all about using this guy most of the time. Its biggest problem is that it only has 10 rounds for the AC10; I'd take out one of the heat sinks (going down to 15, which is enough to run and fire both the PPC and AC10 constantly with no net heat gained) and add a second ton of ammo. Totally reasonable.
-Champion: Fast for a heavy at 5/8, but not real impressive firepower with an AC10, SRM6, and 2 each ML and SL. Mostly suffers from having not enough armor. Still probably better than the similar Dragon, however.
-Lancelot: Good 'cause it has a PPC and Large Lasers and at least enough heat sinks to fire two of them a turn all the time while moving. If it gets close and has a good shot, an alpha strike of PPC, 2xLL, ML could do crippling damage to an opponent. But then the Lancelot is going to need to stand still to cool off for a turn. A little low on armor for a 60 tonner, but can do a lot of damage.
-Bombardier: A long range missile support mech with no staying power for its main role in the name of a few mostly superfluous close range weapons. Take out the SRM4 and MG, replace them with 2 more tons of ammo and a couple MLs, and then you at least have an Archer. But then, there already is an Archer.
-Guillotine: It is the well appreciated Grasshopper, but with an SRM6 instead of an LRM5. I'd rather have the SRM6 (as it supports the other close range weapons well) than the token LRM5 (which isn't going to have much effect if you can get inside laser range anyway). Solid armor, good heat sinks. Good heavy mech.
-Black Knight: Same as the Lancelot, but with more MLs for a close range alpha strike followed by a close range cooling off. More armor for when it has to stand there and cool off, good heat sinking capacity for non alpha strike continual operations. All around solid. Looks cool.
-Flashman: A lot of lasers, a lot of armor, a lot of heat sinks. It can't possibly be bad. I'd probably take the Black Knight for about the same BV due to it having a PPC on top of all the lasers, but Flashman is inarguably a very solid contender in any situation. If only it didn't look so goofy.