Nano Ray is objectively the better teamup and if you disagree you are factually wrong.

Ultrons primary weakness is a lack of burst heals. Nano Ray boosting your single target healing output to 110 HP/s while piercing and while having infinite range makes it incredibly strong.

Also the base Peni teamup is literally useless, it heals for 45 HP over 3 seconds, that's REALLY bad (putting your normal drone on someone for ONE second almost heals as much). Plus anyone who's in the radius of a normal drone straight up gets no effect (i also tested Firewall with it and the bonus drones do not get bonus health).

Really the only thing making it not completely worthless is the fact that Nano Ray has the animation issues, which honestly really aren't a big deal compared to what you're getting out of it.

That being said this does get completely thrown out when talking about Peni's enhanced teamup, because having; what is essentially; a mini-gambit ult every 20 seconds is REALLY strong.