I can
hook you up.
This is the RVN-3L build that gives everyone fits. You can substitute out a MLAS for TAG if you are a team player or just like free money.
The 3L is the undisputed king of light mechs because of it's ability to mount ECM, 2xStreaks, while reaching the speed cap. It is just an unbelievably powerful little package in a 30 ton mech.
Take a look at its rivals. The Commando is smaller, no lasers, and not as fast. The Spider has no missiles and jump-jets are not yet meaningful to give up what it does to get them. The Jenner, the disposed former-king from pre-ECM times is still powerful, but the lack of ECM relegates to to an also-ran.
Yes, ECM and Streaks combined are just that powerful. While the curtailing of the lag shield as reined in the Craven from the absolute beast it was when noone could hit it, it is still a extremely potent light mech.
Another option you could consider is the Cicada-3M, which is a medium mech that plays like a burly light. If you don't care about ECM or have a negative predisposition to hopping on the bandwagon, the Jenner is better than ever due to jumpjet changes, but you WILL be killed by 3Ls.
The Death Knell is great if money is just pouring out of your pockets and wallets and you have no idea what to do with it.