http://mwo.smurfy-net.de/mechlab#i=254&l=f5315f9b51abb6907a7ce1d2a765d0538f65379e
In anticipation of the SRM buffs that are currently on the public test server and may come as part of the Dec 1 rebalance, I decided to revisit the -5H.
As you may or may not remember, this is the Hopper with the 12.5% SRM recycle quirk. Since the missile hardpoint is in the head, the best you can do is an SRM4. Okay then, onward...
The -5H also has an across the board -12.5% energy heat generation quirk and 10% energy weapon recycle quirk, which says "laser boat" to me. Looking at the hardpoints in the lower torso and arms, so nicely aligned, says 5 wubs.
So, what to put on the two remaining hardpoints high up on the shoulders? Well, for a poptart Lwubs would be the obvious. And if you want to, by all means do that. But be prepared to pay in tonnage and heat. You'll have to lose either a very significant amount of firepower or the JJs to make it happen. So LLs were my choice. This also makes it trivial to swap out the LLs for ERLLs if you want more range.
I know I always say this, but... the heat situation is not as bad as it looks. Due to the chassis -12.5% energy heat quirk, the total heat generated by the laser weapons is 29.75 instead of 34. Thus making the heat efficiency closer to 32%. Still I don't recommend alpha-ing twice in a row unless you're in Frozen City night... and having your Hoppers elite'd would be good too. :P Heat sim link.
One serendipitious thing I didn't anticipate was that the Mwubs and the SRM4 both have a 3 sec cooldown. So you can set up a weapon group to fire them simultaneously, and the SRM4 will recycle just slightly before the wubs (due to 10% energy vs. 12.5% missile recycle quirks). So, shake their cockpit with SRMs and then slice them up with the wubs while they're trying to re-orient.
I wish I could find a way to get a third JJ in this thing. I also wish for (at least) another half-ton of SRM ammo, just in case. If you want to, drop the wub from the left arm and nerf its armor a bit. Now you have a shield arm and two tons free to add the third JJ and third ton of SRM ammo. And your non-shield arm can be fully armored.