@Demi-Squad Tertius: Solza, Pyke, Atratus
A few options here - concentrate on one unit or split fire (hard to judge without knowing their magnitudes) and one of two optional attack patterns:
1) Furious charge: if we want to pile in this is the action. Atratus can turn this into two attacks via assassin strike and Pyke can use it to get into ideal firing range. Always a good one to have paid-off for future re-use
or 2) For a hefty cost in cohesion Atratus can use the Raptor pattern 'hit and run' to pull the demi-squad out of the action, but that would seem unnecessary here.
If the kroot squads are small we can also forgo spending cohesion.