Rafales are primarily meant for the northern front. And we aren't going to get either the Rafales or the Su-57 before 2030 at all or in substantial numbers which renders induction of them moot any time after 2030.
Neither are the MKIs with Super Sukhoi upgrades going to be ready then & the delivery schedule of the Mk-1a is such that as on date we don't know how many will be available by 2030 .
Otherwise it can be useful as a sniper , the equivalent of our Gnats hiding in the valleys of the Himalayas to ambush bigger FAs of the PLAAF.
In any case Mk-2 & both variants of the AMCA were due in the 2030s. In other words we'd be shutting the door after the horse has bolted.
Makes more sense to establish the IRF pronto , get more regiments of the S-400 & S-500 since the Kusha SAMs won't make an appearance before 2030 , work furiously to upgrade the IACCS , establish a constellation of SBS of as many satellites as possible , upgradation of cyber defence & offensive capabilities , expedite the procurement & execution of our AEWs & Refuellers such that we get at least the Netra Mk-1a by 2030 & as many of the Mk-2 as possible .
Apart from this go the whole hog on building a massive inventory of SAMs , BMs , CMs , Hypersonic Missiles , LMs , Drones , other ammo like TBMs , Rockets - guided & unguided , 155 mm shells etc besides ensuring we have wartime mfg capabilities & capacities .
I'd leave out secret works like tunneling thru mountains to establish posts , storage depots etc assuming they're being undertaken though we aren't aware of the actual nature of their work & the extent to which the IA relies on these networks for obvious reasons.