Some Russian Sub-systems and complete systems maybe worthwhile for Pakistan to consider. Beyond the Pantsir and Mi-35; which should be studied against the more favorable more modern Turkish options; Here are 12 items that should be looked into.
1. A slightly older ABM system of older S-300VM missile may be worthwhile purchase. It could be purchased for a bargain price, but still features radars, communications, and training to engage enemy ballistic missiles. The large rocket motors and casings and TEL Launcher could be applied to "other" projects as well ...
2. Russian coastal surveillance Radars (Over the horizon) could be purchased as an EEZ management system, and help direct drones to potential hostile military or commercial activities in our EEZ.
3. Russian ESM/ELINT equipment could help in managing the EM spectrum better in times of heightened tensions. Russian experience gained from Syria, where they operated in the same space as most mid-east nations and NATO means they soaked up a lot of transmissions. There is a lot they could package and offer to a customer willing to pay.
(in this vein, Russian technical schools could also teach Pakistan's brightest technical students in an exchange program, and work on joint ventures in commercial e-commerce)
4. Russian officer exchange programs could help better understand Indian training and tactics at all levels of C4ISR, as well as give our officers a different way of thinking. Russians have trained with less modern equipment then the west, and training to confront a more modern force, therefore training with such constrains would also be useful.
5. Russian Mi-26T could help in the heavy lift in the mountains and in the cold; especially if the need to support commercial tourist ventures makes its a profitable acquisition. The Russians are experts at cold weather capability.
6. Russian Small Arms especially CQB Carbines for Special forces (army and police) could be bought to maximize efficacy of quick reaction forces.
7. More modern RPG rounds to maximize penetration against all but full on tanks requiring ATGMs which should also be studied
8. Russian Night vision equipment if its wins out in a competition among other suppliers. Russian cold weather equipment from the most simple rugged car engines to advanced optronics could help save lives when stuck in extreme cold weather.
9. Russian command and control equipment for Submarines; VHF shore based and sub based masts, etc. Russia's decades of experience when it comes to submarines and the training to operate diesel-electric submarines when hunted by enemy SSNs is also an important intangible that should be looked into.
10. Kashtan-M missile and gun based defense system to upgrade the Azmat Class FACs
11. Komor submarine detection system;
http://roe.ru/eng/catalog/naval-systems/stationary-electronic-systems/komor/
12. Russian ERA Armor or Composite Armor upgrade packages for Pakistani Tanks. This one is hardest of all to get considering close Russian-Indian ties, but should be looked into none the less.
Russia has experience, tactics, and many rugged systems that are world class; and that too at reasonable prices.