Pakistan has:
HQ-2, the Chinese version of the
Russian SA-2 (range 7 to 34 km / altitude 32km),
the Chinese
PL-9 (range 15km, altitude 4.5km),
the French
Crotale (range 12km, altitude 5,5km) (with a Chinese equivalent in the form of
HQ-7/7a a.k.a. FM-80/90 which has a 0.5 to 12km range (12km against slow target, 8.6km against fast target) / 0.3 to 5km altitude),
the Swedish
RBS 70 (range 0.25 to 8 km/altitude 5km),
the French
Mistral (range 0.5 to 6km / altitude 3km)
the American
FIM-92 Stinger (range 4.8km, altitude 3.8km).
Anza Mk I (licensed copy of
Chinese HN-5: range 0.5 to 4.4km / 2.5km altitude),
Anza II (licensed copy of the
Chinese QW-1: range 0.5 to 5.5km / 4km altitude),
Anza Mk III (licensed copy of
Chinese QW-2: range 0.5 to 6 km / 3.5km altitude)
(not going into older MANPADS like SA-7 Grail and FIM-43 RedEye)
So, lots of MANPADS and (Very) Short Range Air Defense Systems (V/SHORADS).
Mostly IRH, with the exception of Crotale and RBS-70.
The only MR-SAM being HQ-2.
No long range systems
Best thing in the short term would be:
- modernize HQ-2 to latest version or best possible standard (or replace by KS-1)
- modernize Crotale to latest version or best possible standard (or replace by latest HQ-7A)
- add a system in between HQ-2 and Crotale/HQ-7A.
- add a system above HQ-2
I was going to assume Pakistan would obtain a chinese system e.g.
LY-60, which provides (marginally) longer range of 18 km / altitude 12km. As it happens, however, Pakistan is getting at least some
Spada/Aspide 2000 systems (25km range), which I think is a better option than LY-90
While I acknowledge that there are better and longer ranged systems available above HQ-2, a good complement or even replacement might be the Chinese
KS-1 (50 km range, 25km altitude).
Other than that, you end up with long range systems like the Chinese
HQ-9 or Russian
S-300. Possibly
SAMP/T (land version Aster-30), with 50-100km range depending on target and altitude.