The Indian concept of RAPIDs (each with 2x Infantry brigades, 1x Armoured brigade (i.e. 2x MBT regiments and 2x IFV regiments)) is rather impressive.
It does not appear Pakistani mechanized divisions are equipped with MBT's. Does each Pakistani mechanized brigade have 3x mechanized regiments?
Meanwhile, China has recently displayed an IFV based on Type 59 tank chassis. An opportunity exists for PA to convert a part of its massive inventory of Type 59's into IFV's, which in turn can be used alongside ATGM mounted APC's like Maaz.
ZTZ-59 HIFV
China's first heavy infantry fighting vehicle uses the chassis of the ZTZ-59 (a copy of the Russian T-54) main battle tank.
Oedo Soldier
The ZTZ-59 tank, a 60-year workhorse copied off the Soviet T-54 tank, got a new lease of life in the form of a heavy IFV (or HIFV). The HIFV mod weighs about 40 tons and can carry up to seven passengers. So what new tricks has the old dog learned? Modifications include moving the engine to the front of the vehicle chassis, increasing tank armor on all sides, and installing a rear door for dismounting infantry.
Its 105mm cannon and the entire turret have been replaced with a much smaller turret consisting of a 30mm autocannon, a searchlight, and electro-optical sensors. The HIFV's bulky, all-aspect armor would make it well suited for either urban combat or high-end warfare in open environments. Likely customers could be existing T-54/T-55 buyers in the Middle East, particularly those looking for armored vehicles to fight insurgents in urban environments.
https://www.popsci.com/china-has-fleet-new-armor-vehicles
Maaz is already in service (in small numbers though).
There are two Artillery divisions in PA, the 21st Artillery Div based at Pano Aqil (currently deployed to Swat) and 2nd Artillery Div based at Gujranwala.