I've done things like this before:MechsVizier Assault Mech: 100 tons, 3/5 movement, XL engine, XL gyro, 304 points standard armour, 12 double heat sinks. Remaining space: 55 tons, 39 crits.
- Command: 3 LRM-15(6t ammo), ER Large Laser, LB-10X(2t ammo), 3 Medium Laser, C3 Master, 2 double heat sink
- Combat: 2 LB-10X(4t), 2 MML-7(4t), ER Large Laser, Plasma Rifle(2t), TAG, C3 Slave, double heat sink
Bey Heavy Mech: 75 tons, 4/6 movement, XL engine, Endo Steel, 224 points standard armour, 12 double heat sinks. Remaining space: 39.5 tons, 27 crits.
- Command: ER Large Laser, 2 LRM-15(4t ammo), Plasma Rifle(2t ammo), 2 Medium Laser, ECM, C3 Master
- Combat: ER Large Laser, LB-10X(2t ammo), 2 Plasma Rifle(3t ammo), 2 Medium Laser, TAG, ECM, C3 Slave, double heat sink
Pasha Medium Mech: 50 tons, 6/9 movement, XL engine, XL gyro, Endo Steel, 168 points standard armour, 10 double heat sinks. Remaining space: 23 tons, 25 crits.
- Command: LRM-15(2t ammo), ER Large Laser, Medium Laser, 6 Jump Jets, C3 Master
- Combat: 2 MML-7(2t ammo), Plasma Rifle(2t ammo), 6 Jump Jets, C3 Slave
Sipahi Light Mech: 30 tons, 10/15[20] movement w/MASC, XL engine, XL gyro, Endo Steel, 88 points standard armour, 10 double heat sinks. Remaining space: 7 tons, 23 crits.
- Combat: 6 Medium Laser, C3 Slave
- Scout: 10 Jump Jets, TAG, C3 Slave
I really like the 10/20/10 scout build, in particular.
(Note that TAG is super-abundant because this was a force designed to use it well - lots of semi-guided LRMs, Copperhead arty rounds, and laser-guided bombs)