I had a bit of an idea for one like the Wargrove Battalions from the Sylvaneth battletome with their whole require one battalion with extra something and can include other battalions that is made for an aggressive saurus army focused around the Sunclaw Starhost with one big improvement to it since it's not the best one out of the battletome
Claws of Dracothion Constelation (80)
Requirements
1 Slann
1 Sunclaw Starhost with 4 Saurus Warrior units
Optional
1 Saurus Oldblood or Saurus Oldblood on Carnosaur
1Skink Starseer
can include one of each other battalions in the battletome and if it does it gets the benefits from the Starbeast Constellation Battalion
any Seraphon unit
Bonuses
Any Saurus warrior unit has max benefit from the ordered cohort ability with no reliance on models in unit
Saurus units gain 3 on their charge roll and if they charge 10 or more inches gain 1 to hit with attacks with jaws in the name, if saurus is mounted, mount jaws attacks do not gain bonus
Slann knows spell Wrath of Dracothion, which has cast value of 7. Pick 2 units in 20 inches and roll a die for each unit. if you roll a 2 or more the unit takes d6 mortal wounds, if you roll a 6, the unit takes 6 mortal wounds.
Its Supposed to be an aggressive constellation with allowing you to be able to have small mobile warrior units with still having decent army design and the spell is just to give slann an aggressive spell with a fun imagining of huge celestial claws whacking things.
I hope you don't feel like I'm hijacking your idea, but how about you'd change the starhost slightly to make it a supporting buff to your aggressive Bloodclaw starhost? Something like this:
Claws of Dracothion Constelation (80)
Requirements
1 Slann
1 Sunclaw Starhost
1 Saurus Oldblood or Saurus Oldblood on Carnosaur
1 Astrolith Bearer
The Firelance and/or Eternal starhost battalions in the battletome, granting the benefits from the Starbeast Constellation Battalion.
Any Seraphon Units
Bonuses
-Saurus units of the same type may share beneficial buffs as long as they are within 8" of each other.
-Saurus units gain 3 on their charge roll and if they roll 10 or more for a charge they gain +1 to hit with attacks with "Powerfull jaws and Stardrake shield". Additionally, while rolling 10 or more on a charge roll, Saurus units gain a +1 wound on all wound rolls until the end of the players turn.
-Any Saurus warrior unit has max benefit from the ordered cohort ability with no reliance on the number of models in it's unit.
-All Saurus Knights in the Firelance Starhost may attack at the same time while charging as if they were one big unit. And Saurus knights gain the +1 to hit bonus, while rolling a 10 or more for a charge, on their Celestite lances and blades as well.
-Saurus guard units can choose to "Pile in" from a greater distance. Roll a dice, if the amount is equal to the distance from where he can attack an enemy, you can make them "Pile in" instead of charging. They will not gain the +1 bonus on wound rolls nor the +1 to hit with their jaws, but they will still gain the +1 save if they are in cover, and the D3 damage from the Eternal Starhost.
-The benefits from the Starbeast Constellation Battalion.
-the Slann knows the spell "Wrath of Dracothion", which has cast value of 7. Pick 2 units in 30 inches and roll a die for each unit. if you roll a 2 or more the unit takes d6 mortal wounds, if you roll a 6, the unit takes 6 mortal wounds.
While the Starbeast Constellation Batallion effect is in place, the Slann's "Light of the Heavens" spell now instead of the previous bonus gives all friendly Seraphon units a chance to ignore wounds and mortal wounds. When a non-hero Seraphon order unit suffers a wound or mortal wound, roll a dice. On a 6 that wound or mortal wound is ignored. Friendly Seraphon Hero units can ignore wounds and mortal wounds when they roll a 5 or 6 on a dice roll. It still applies the normal bane to enemy chaos units.
Additionally, the Slann may also use his command and may make a spell check to increase it's effect. On a roll of 7 or more, the range of his command increases by 8", and allows re-rolls on saves in the combat phase as well.
-The Astrolith Bearer does not have to plant it's banner in place to provide it's benefits to it's fellow Seraphon.
The idea here is that you are limited to just 2 additional Starhosts. But in return your Slann his "Wrath of Dracothion" spell is now a 30" long range damage spell. Allowing him to make up for your lack of ranged attacks. Additionally, the Slann his "Light of the Heavens" finally has a use, as it now give a chance to ignore wounds and mortal wounds on a roll of 6, or 5 and 6 for Heroes. As well as boost all the Saurus under your army, especially their charge.