Looking on the internet deeply has found these results:

i have discussed is the most popular phrase on the web.

i had discussed 119,000 results on the web	i have discussed 1220,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Pluperfect I had discussed you had discussed he had discussed we had discussed you had discussed they had discussed. Future I will discuss you will discuss Sep 28, 2015 ... I had discussed with you. The discussion happened yesterday night and I am referring about same discussion while writing an email. Today I wouldn't write ' I had discussed with him about training. ... Tomorrow: " Yesterday, I said that I had discussed X with my friend." 3. Wouldn't you write 'who ... Past perfect. I had discussed you had discussed he/she/it had discussed we had discussed you had discussed they had discussed ...	Today: "I have discussed X with my friend." Tomorrow: "Yesterday, I said that I had discussed X with my friend." 3. Wouldn't you write 'who agreed' instead of ... Present I discuss you discuss he discusses we discuss you discuss they discuss. Perfect I have discussed you have discussed he has discussed we have ... ... Present perfect. I have discussed you have discussed he/she/it has discussed we have discussed you have discussed they have discussed ... I have discussed this item with Dean Bowers and told him that we were unwilling to make a commitment at this time to take over Dr. Atwood at the end of five v

i had discussed

119,000 results on the web

i have discussed

1220,000 results on the web

More popular!

Pluperfect I had discussed you had discussed he had discussed we had discussed you had discussed they had discussed. Future I will discuss you will discuss
Sep 28, 2015 ... I had discussed with you. The discussion happened yesterday night and I am referring about same discussion while writing an email.
Today I wouldn't write ' I had discussed with him about training. ... Tomorrow: " Yesterday, I said that I had discussed X with my friend." 3. Wouldn't you write 'who ...
Past perfect. I had discussed you had discussed he/she/it had discussed we had discussed you had discussed they had discussed ...

Today: "I have discussed X with my friend." Tomorrow: "Yesterday, I said that I had discussed X with my friend." 3. Wouldn't you write 'who agreed' instead of ...
Present I discuss you discuss he discusses we discuss you discuss they discuss. Perfect I have discussed you have discussed he has discussed we have ...
...
Present perfect. I have discussed you have discussed he/she/it has discussed we have discussed you have discussed they have discussed ...
I have discussed this item with Dean Bowers and told him that we were unwilling to make a commitment at this time to take over Dr. Atwood at the end of five v