I think Stellar Tera is worse off on Serperior than something like Fire or even Dragon. You only receive a +1 boost from Tera Blast, which is worse than that of Leaf Storm’s +2 and lose out on the ability to hit Grass resists or what have you for super effective damage. I believe it’ll certainly see some use on Valiant and Enamorus though.Enamorus and Serperior come to mind first.
I also like to believe that Iron Valiant would make for a good Stellar type option. A lot of fast hard hitting Pokemon or Contrary Pokemon would be ideal for Stellar Tera. You want to use it to counter Pokemon who use it defensively, which is a lot of Pokemon really. Like for example using it to counter Kingambit.
 
 
		
 
 
		 has 120/110/120 bulk while Terapagos-Terastal has 95/110/110 and is locked into stellar tera (no way to change out of pure normal), Cress has reliable healing (Moonlight) while Terapagos is stuck with rest and Cress gets stab for a boost on stored power strength.
 has 120/110/120 bulk while Terapagos-Terastal has 95/110/110 and is locked into stellar tera (no way to change out of pure normal), Cress has reliable healing (Moonlight) while Terapagos is stuck with rest and Cress gets stab for a boost on stored power strength. 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		



 
 
		 
 
		 
 
		 
 
		 
 
		













 
 
		 
 
		




 
 
		 
 
		