Just using what you indicated is available, I want to ask why not the Griffin and Shadow Hawk in the Strike lance?
First Lance - Command/Heavy Lance
MAD-5D Marauder - Not sure if I want to snag a new Marauder mini or try to paint up my old, 3rd Edition plastic Marauder. Either way, there will be a Marauder.
JM7-D Jagermech - Not much maneuverability for an armored cav company, but . Added for direct fire support and on account of it being a token Fed Suns mech.
JM7-D Jagermech - Yeah, another one.
CN9-D Centurion - The OTHER medium mech of the Fed Suns. Worried that it is the only mech in the lance that is not jump-capable. Better walk/run speed may make up for it, though.
Second Lance - Striker Lance
GRF-1N Griffin- Speed, Mobility, Fire Power. You want this in a Strike Lance.
WVR-7D Wolverine- Spot was previously going to be filled by a Shadow Hawk until I realized that I had the foresight to buy a metal Wolverine.
PXH-3D - Phoenix Hawk - Solid medium mech. Slightly faster than its lance mates.
DV-7D Dervish - Solid 55 tons of LRM support. Because, you can.
Third Lance - Fire Support? Striker Lance #2?
VTR-10D Victor - I don't really like either of the 3050 upgrades for the Victor, but I really like the Victor. I wish that there was an LB-X 20 variant, but I will take the Ultra 20. Anyway, solid Fed Suns mech with nice maneuverability.
ENF- 6M Enforcer III - Refresh of the venerable Enforcer.
ENF-5D Enforcer - THE medium mech of the Fed Suns
ENF-5D Enforcer - Because a Fed Suns company can't have enough Enforcers. And I'm running out of ideas...
Well, the third lance is a little heavy, but it's better than trying to squeeze in two Valkyries instead of the Enforcer-5Ds, but you might want to try it with the Valkyries. The point is that an Assault mech appears in what otherwise looks like a light or medium lance. They all jump, and it's scary. The only thing better would be to use Panthers with the Victor (ask the DCMS for details).
All your non-jumping mechs are together in one lance as it should be. I don't know which mech the company commander rides, but all three lances have much better synergy working together or independently.
This is just one option and you can choose any Griffin if it works for you.
GC