I currently have a Nextcloud server on a Raspberry Pi 3, which works perfectly fine. In addition I want to setup my Raspberry 2 as a Gitlab Server.
I also have an unused Raspberry Pi 1 Model B+, which I could use as an reverse proxy with nginx + Let's Encrypt SSL management and GeoIP Blocking. So Pi2 and Pi3 need not care about about that which could be a huge performance advantage.
But the question is: Does the slow performance of the Pi1 have any impact on the performance of the other two Pi's?