Pakistan never helped Iran against Saddam , just Libya Syria and North Korea provided missiles for Iran . Pakistan sold some technologies for peaceful nuclear activities that we could buy from North Korea ( and we never produced nukes) . Iran didn't creat AlQaeda Taliban or even Afghanistan pro America government (or whatever you call northern terroristic alliance) but Pakistan Saudi and CIA did
. You know that just a couple of months ago terrorists who mostly after their attacks flee to Pakistani territories killed tens of our military officers in a bus and recently Aljazeera revealed role of Bahrain and Saudi in supporting these ppl to drag the war inside Iran . While Iran gives hundreds of casualties every year on borderline with Pakistan , Pakistanis have no substantial border guard with Iran and I don't know your source for Baluch terrorists in Iran while these suicidal groups have thousands of Madrassas in Pakistan and US drones bombed them thousand times . Pakistanis who fought for Iran in Iraq and Syria are the ones who fought against ISIS headchoppers and most of them don't return to Pakistan because Pakistani intelligence is just good to arrest these ppl not real terrorists . Iran can assure it's interests with any country like how you deal with Saudis (the ones who support India on Kashmir issue ) or USA
My dear Pakistan was scared of US warning and stopped construction of Gas pipeline for development of its industries and you are talking about importing oil from Iran ? Even Iran export oil to china in a smuggling way you are talking about exporting oil to India (close ally of Israel and US )? Read this
https://www.voanews.com/south-central-asia/india-has-ended-iranian-oil-imports-ambassador-says