Yeah, that's why my favorite heavy mech is the Loki Prime.
It has even more firepower than the Puma C, if harder to aim with, but the electronics just make me feel good.
Actually 6MBLs on the Puma (Adder) are equivalent to 2CERPPCs, so the Loki (Hellbringer) has only 2MBLs extra damage (it has 2 MBLs IIRC, it's been a while) without getting into SSRM range. The Loki also doesn't have much more armour than the Puma; but other than the Steiner-Scout (Atlas) it's the best Heavy Scout in the game (I haven't played dedicated Scout since 0.3

)
On Topic:
Favourite Weapon Systems;
UAC5s Huit Prime or Siege Engine I can't get enough of the UAC5 in 2s and 4s!
* RACs ...moar Dakka Dakka! Dakka Dakka requires skills to keep damage on a single component of an evading target..forget what you've heard about LBLs requiring "skill" to keep from spreading Lolz!!!
**MHLs: Don't laugh, they've been nerfed into "meh" recently but they (like the XPLS) are one of the best implimentations of lasers that have ever been seen in a MW game. LBLs are just cheesy hitscan twicth BS, the Heavy Laser is a refined weapon of skill..from a more elegant age

A small difference on discharge time = a better balanced weapon with more gameplay value (ie requires practice and skill to use 100% effectively).
X-Pulse: Awesome stuff! The only other non-cheesy laser system in MWLL, requires skills to use effectively like the other Dakka dakka weapons, not cheap-ass easy mode like the Beam Lasers.
As you can see from the above I love the Dakka Dakka stuff, takes time and accuracy to employ correctly, they have long discharge durations and generally do not feel cheap using them (looking at you LB-20X and CERLBL

)
Vehicles:Partisan Prime (ok I don't use it now with the RAC variant in the same price range...who would?), this is a classic and slightly better at AA work than the RAC Partisan (IMO).
RAC Partisan (B?) "Smugylanka" my Dusky Maiden...even if she's had her armour reduced with the new Hull System she's still a thing of Dakka Dakka beauty, from 500-600m she's a killer.
Huit Prime, good armour, good firepower, would prefer if it were 4UAC5 and 2UAC2 with the ~80K price tag.
Huit Gauss/Arrows, I used to love this tank prior to Clan Arrows getting buffed, now it feels as cheap as a MadCat B or any given NovaCat.
Raven E of course, 2MXPL and a MRM20 and all the electronics makes this the best starter C3 Scout IMO (earned me a MkII E in 4 minutes the other day with one when I joined a game midway through, I was engaging Heavies and Assaults while they fought our brawlers), this 'mech is a little money-maker, one of the best.
Bushy B, gotta love the Owens Bs bigger brother, It could use some XPLs though
Bushy XPLs/SRM (D?), inexpensive heavy armour and some fun weapons to tickle the enemy with.
Bushy A, the Warthog, 2RAC5 for when you absolutely have to take an arm off in a few seconds

One of the top 10 variants in MWLL IMO.
Warhammer Prime (old-school) I take this for the nostalgia, it's still a decent 'mech however.
Warhammer LXPL/Gausss, a support machine, much maligned by most players, I've had some good success with it though.
Warhammer ERPPC/Light Gauss, a better sniper than the Vulture A (GaussDog), doesn't have the speed of the GaussDog but has a thicker hide and more electronics....excellent for LTA hunting I find.
Vulture (Mad Dog) A, the GaussDog. Everything feels right with the Gauss Dog, only thing I'd do is remove that non-canon SRM4 and add the weight to side torso armour (like the Cougar, the Vultures side torsos are too massive for their armour levels, unlike the Cougar the Vulture has not been fixed yet). But these are minor considerations, this 'mech is one of my original "true loves" amongst the Clan machines
Mad Cats (Timber Wolfs) and
Nova Cats (err...Nova Cats

) I tend to avoid (I was in a Madcat Prime yesterday for the 1st time since 0.2, and I had meant to click on MkII Prime but hit the wrong button, I had to set the weapons groups and everything!). When coolant has been fixed I will probably enjoy these machines, the Timber Wolf Prime was my go-to machine in stock 1on1 MW2&3 games and one of my favourite configs of all times.
Awesome 4PPC I love and would use a lot more if the LXPL version was not just tons more fun to use, I spent most of 0.3.2 in a Huit Prime or Aweome 4PPC, and it's a favourite I have from CBT.
Awesome 4LXPL, this machine requires brawler support as it cannot brawl, but as a fire-support 'mech it's one of the best.
Mauler ERPPC UAC2s and ELRMs can change the tide of a battle, upset enemy campers (allowing brawlers to advance safely) and do some AA assist work; the Mauler has always been one of my favourites (see my sig) as I identify as a direct fire-support player...I'm too old for brawling these days
Mauler 2LB-20X and SXPLs I rarely seem to use, but every-time I do I have an immense amount of fun with it (even with the LB-20X cheesiness) just need the right maps to get a 50kph asset into 350m safely (*cough* city map *cough*).
Atlas, Mr Bubbles, like the SXPL Mauler it's situational (needs a city to fight in) but once in it's ideal enviroment it's quite a beast... particularly against Tanks.
MkII Prime, one of the few Clan Primes I like, good if you have an APC nearby to keep the Gauss stocked.
MkII E "Siege Engine"; right now my favourite machine in MWLL, it's a uber-Dakka-Dakka swiss army knife machine, capable against all targets if prone to rushes (show me a 'mech under 80kph that isn't?), it never feels cheap rolling in the Siege Engine, and switching targets between 'mechs, tanks, BA, ASF and VTOLs (and engaging each with equal ease) keeps the pace of play fast (well as fast as 65kph can get you to within 800m of any target)
*Daishi (Dire Wolf) Prime should have 4CERLBLs and 2UAC5s in it's Prime Config, that will just be brutal in MWLL, noob-tube CERLBLs for hitscan armour removal, UAC5s to exploit the multiplier on destroyed side torsos and enough heatsinks to not really worry about heat = dead enemy very fast!)
** On a side-note why no 4RAC5 Assaults for the IS? We know that the Devs have tried it in Alpha and claim that it
Annihilates (

) everythig that moves. So it seems the Devs have decided 4RAC5s are OP yet they should still fit on the Awesome, the Mauler and perhaps the Fafnir given their weapon pod slots. MWLL allows a quad CERPPC or 5ERLBL NovaCat alpha striking (with enough coolant to keep the alphas flowing) and yet it is claimed as balanced due to the asset cost..... then why can't we have a Quad RAC5 Mauler or Awesome and stick a 130K+ price tag on it? I'd be building one in Mechlab anyways so shouldn't we test it exhaustively first? And Frosti thinks the Devs are pro-IS biased

EDIT: to read better