In the modern scenario, the use of UCAVs makes a significant difference as its an active threat to tanks and other armored vehicles. If complimented by gunships, this combination can become deadly as UCAVs to a great extent perform the role of a CAS aircraft with the armament they carry minus the cannon. While PAA may keep gunships in own airspace, UCAVs can/will cross the border in the event of a conflict. Isn't it a relief that PAF may not be required for CAS.
Then the ATGM support on the ground through TOW and BS equipped M-113s or 4x4 aided by infantry carrying M-113s. This combination of anti-tank capability and holding ground ability by infantry is crucial in capturing territory to consolidate the advance of armored forces. So far neither UCAV, nor gunship or infantry can blitz through enemy lines like a MBT. A UCAV can soften targets by tank plinking but to advance into enemy territory, tank and APCs are needed.
There is another tactic. While UCAVs take out enemy armored vehicles, PA M-113s (ATGM/12.7mm) move in to sweep the remaining area for capturing and holding or chase the enemy. Although MBTs can chase better to cut off retreat but they do need back up by APCs. Some say MBTs are obsolete. In dense AAA and SAM areas, UCAVs may not survive for back to back sorties. UCAVs are more mobile than MBTs, but MBTs can have a high survival rate. In logistics, support, maintenance, the MBTs need a complete setup in the battlefield and mobile workshops.
The factor of artillery remains. Tubed and rocket. Guided, RAPs, anti-armor - all types of ammo. Different targets, ranges, ammunition logistics, OTH fire support. Artillery lies in support, not direct contact like other arms.
We should be talking about wiped about armored regiments, 25%, 33%, 50%, 75%, massive losses, whether AK or T90s or VT4 or T72. Replacements for MBTs in PA are hopeless. Both armies can defend their territories, but its the attacking punch through the enemy lines which starts an offensive into enemy's territory. If the replacements are soggy T-59s then GHQ will throw in reserves. Crews train on T-59 but man VT-4 now, its such a downgrade to go back to T-59s. The slow speed is another bummer. No modern electronics.
I think its the first thrust for armored regiments that matters the most, after that its a strength of replacements, logistics and support to continue an offensive. If the first ones a disaster, then that regiment will be sidelined for secondary tasks. A CV-90 or M2 Bradley like vehicle for cavalry could have an addition for back up if MBTs take bad losses but that 125mm gun wouldnt be there still and thin skin in direct contact may not be the best choice.
All in all, all these arms and weapon systems go hand in hand. MBTs with APCs, SP guns, UCAVs and gunships.
Just be wary is all i will say. I suspect we are in for a nasty surprise with regards to UCAVs, the main reason being, we arent facing incompetent conscripts being deployed on SAM's. All of these recent conflicts have highlighted one thing, it is not the fact that these UAVs are impenetrable, it is the fact that there was no competent adversary. While i wont go ahead and say the Indians are on the forefront of training and expertise, i would expect their men to have more knowledge and experience on their systems than the Russians or Armenians. Ironically, Russian IADS is all but "I", it is highly disjointed, with no real functional IFF, no real c&c and no proper data sharing. I think we will see far greater attrition rates of drones in our theatre, simply because we are actually fighting a reasonably competent adversary. Though, this isnt to say the psychological impact of them, or tbh, even the additional numbers they bring wont be beneficial, but what it is to say is, i wouldnt put it past Indian AD operators who are protecting these forward formations to do a decent job of protecting them. But then again, does also depend on what systems they are given, naturally, Osa etc is basically useless as it cant reach at the altitudes these drones operate at anyway.