Sorry for that
I think Su 30 is a Air Dominance/Superiority Fighter and LCA is a Trainer/Light Attack/Point Interceptor
What you need to do is to learn, not think!!!!!
If su-30 is a air dominance fighter in russian airforce , then what was the role of Mig-29 recon fighter or CAS fighter.
You dont even know the basic fact that heavy weight high load carrying long distance flying fighters are like Su-30 series are mainly used for strike and light weight , lesser range lower pay load carrying fighters like Mig-29 are used primarily for air defence.
Russia Has Air Superiority Fighters Like Su 35 , Su 27 ,Su 30 SM along with MiG 29 . For Interception they Use the MIG 31 Fox Hound , for Ground Attack and CAS Su 25 Frogfoot . And Penetration and Heavy Strike for Su 24 Fencer . for heavy Bombing Role They use the Su 34 . these are all fall in the Fighter category . they don't have a Multi role Aircraft . MiG is trying to Modernize MiG 35 as a Multirole But it's not Met the Requirements
the high wing loading flanker airframe started out as strike fighters not air dominance fighters. It was the failure of the MIG and the addition of thrust vectoring that has made them usable for air to air role also. Even then their elephant sized RCS when fully loaded means they have the disadvantage of being detected earlier than smaller RCS loaded fighters like mig-29 and tejas.
Their Threat is nothing They don't want to Go for Again ..their Mission is Intercepting and Escorting Civilian Planes and Bombing Terrorists Hideout in Somewhere in the Middle East or Africa
Both are different like Desktop and Laptop