Clan assaults that can banzai charge are limited to things like the Executioner and Gargoyle, of which the Spirits presumably have few.
Same goes for the heavy cavalry omnis typical of most Clan toumans.
For Spirit flavor, I might look to the more mobile and closer-ranged configurations of the Spirits' homegrown omnis. That means...
In open terrain...
Crimson Langur E: 168 armor, 7/11, 3xPulse Med, 2xSSRM-4, 6xER Small
Stooping Hawk E: 173 armor, 5/8, LB 10-X, 3xATM-3, 2xER Med
In built-up terrain...
Crimson Langur B: 168 armor, 7/11/7, ATM-9, 3xER Med
Stooping Hawk F: 173 armor, 5/8/8, 2xPulse Med, SSRM-4, 2xHvy Med, 2xHvy Sm
I might anchor two pairs of these with a Blood Kite for support. Not every unit has to go banzai. Stars would look like this:
Open terrain...
Blood Kite
Stooping Hawk E
Stooping Hawk E
Crimson Langur E
Crimson Langur E
Built-up terrain...
Blood Kite
Stooping Hawk F
Stooping Hawk F
Crimson Langur B
Crimson Langur B
For variety, substitute a Nova Prime, E, or S for a Stooping Hawk. Or a Viper A or E for a Crimson Langur. Or a Kingfisher for a Blood Kite. Or an Executioner if you want the entire star to charge.
To show the desperation of the Blood Spirits, substitute an ancient Coyotl A for one of the Crimson Langurs.
Hope this helps.