Not a good idea unless they are asking for it openly. We have not found critical evidence of Azeri arms supplies to Pakistani terror groups. Political jibes here and there are OK as long as they are not actively stepping in. Once they do, we can do what you say.
A glaring contrast here is that we have found caches of Turkish small arms and rockets in the hands of terrorists sponsored by the Pakistani military and yet have done nothing about it. By your logic, PKK should have been hammering Turks across Anatolia using our weapons in retaliation. But it's not happening.
Coming back to your point of giving Yerevan longer-range missiles to hit Azeri oil fields, you must know that it would be a global disaster in every way - environmentally, and economically due to oil prices shooting up, and geopolitically.
Hitting Baku's oil fields would result in a catastrophic increase in oil prices worldwide. The EU would face the worst if that were to happen, meaning that European countries would start arming Azerbaijan as well alongside Turkey against Armenia.
Armenia's weakness is its lack of bargaining tools in geopolitics.
- It is sandwiched between Turkey and Azerbaijan
- Has no oil or gas or rare earth minerals or lithium (not even undeclared) which can make others listen to its demands
- No strategic coastal access either on Caspian or Black Seas
- A dwindling demography with more Armenians living outside their country than inside
- Very limited industrial and technological capabilities
- Lack of foreign investments
On top of that, it is a member of a useless CSTO while its public has strong sympathies towards the West due to a large diaspora population. And the cherry on the cake is that they are an inefficient parliamentary democracy like our country, with 5x more corruption, flaws and bureaucracy.
Yerevan needs to rethink its national strategy very, very carefully as it is really in a bad place.