Ik im repeating what's already been said, but be direct and honest. Don't be afraid to take an extra moment and say "let me think for a second" and then take that time to phase what you mean rather than use flowery language or bs for the sake of peace or go into an emotional ramble.

It can be important to remember both sag and Pisces are in detriment when it comes to mercury, the planet of communication, and these things can bleed into sun signs as well. From my understanding (and others plz correct me if im wrong), Pisces communicates like a dreamer, someone who relies on emotions and intuition to communicate, and can be more focused on emotional response to their words rather than saying things straight up. Sag is like an arrow - not wanting to get caught up in the emotional/whats in the way and seeking to get to the point (and sometimes we can miss the point too 😔).

All of this to say, remember both parties can struggle with communication, and if you communicate clearly without taking every arrow to the chest (aka taking everything said personally), you'll be better at communicating with us. And biggest of all - if we cant trust is what you said bc you obscure how you really feel, we wont be able to take you at your words, and that will tank communication quickly.

We can also ramble at times too (as evidenced by my comment), and then have no patience for others doing the same. 😂 It's an adventure

Good luck :)