Try this for Clan Tech. Just whipped it up a few moments ago, I'm sure optimization can take place, but hopefully the general point will be sound.
Exploiting Heavy Medium Lasers:
40 ton Mech, bipedal, 6/9/6 movement profile.
5 HMLs + Targeting computer (Not sure about the TC, as it adds almost 180 points of BV. Are the odds boost worth it?)
Standard Fusion Engine, to boost durability and reduce cost, for anyone who cares about the C-Bills.
Endo Steel and Ferro Fib are the concessions to high tech, enabling 6.5 tons of armor for 90.5% coverage as well as 15 double heat sinks, meaning that even when running or jumping and alpha striking, we build up only 11 heat, which is manageable because the next turn you can hopefully jump 6 hexes to cover.
Jumping is good because you'll need that to get in close for the HMLs, and who knows, maybe a DFA will carry the day where the lasers won't. Also, there's nothing in the arms, and we have hand actuators, so we can get up easily and punch dirty IS barbarians if we must.
40 tonner was chosen because this armor level gives us 16 points in the RT/LT and 18 in the CT, for fending off probing Gauss Rifles.
BV with TC is 1533, which is a good IS heavy or a middling assault. Could be taken out with good maneuvering one on one. BV without TC is only 1353, down towards the good medium/average heavy range, which might be better even with the acc penalty of Heavy Lasers.
Opinions of anon?
(Expecting over 9000 TL;DRs in the near future, but whatev.)