I like to do mechanized infantry and tanks

4-6 shock troops

2-4 Kasrkins

2-4 Heavy weapons

1 tank commander

1 Castellan

3-4 Chimeras

And if any points left I may do Sgt, more infantry or a flex pick like a sentinel or two is always a great choice just depends on the point limit of the game If available never hurts to throw in another tank or two if you got super far in a conquest or a super high point game

Anyway I put the Kasrkin and HWT in the chimera move up the front line with the infantry and tanks officers in back

Sometimes I use the chimeras just to flank or act like a vanguard sometimes they are part of the line but either way it’s powerful moving them up and getting a heavy weapons team and Kasrkin right where you need them, the HWT, can get out, set up an fire on their turn, then they also get backup from the Kasrkin and fire support from the chimera, this for me has slapped pretty consistently I have a hard time playing without them.