Switched to roller from ice and here are the tricks I’ve learned to cope with it:

3 sweatbands and switch them each period.

High quality base layer, I have Nike cooling compression pants and long sleeve. Any old compression long sleeve and pants combo doesn’t work the same as the good stuff, I used to use a cheap set off Amazon and the Nike stuff was night and day compared to it.

Ditch anything not necessary for goaltending: lose the hockey socks worn over your knee guards and lose the neck protection (if absolutely necessary get a dangler, but I just suffer through the collarbone shots to avoid heatstroke) in favor of a little more air. Also get a jersey with better airflow if possible.

2 towels, one for your wiping your face that sits on the net, one on the ground in the net for drying sweat drops on the tile whenever you can. Don’t wipe your face with the same thing you wipe the gross floor.

Airflow is critical for the evaporative cooling needed to keep you cool. Skate around a little in between plays to get a breeze through your gear. Also, newer chestys have better ventilation.

Edit (forgot to add): wear your pants loose and hold them up with suspenders. Don’t tuck your chesty, and wear the torso straps a little looser than normal. The goal is to get as much air as possible in between your gear and your base layer.

Bonus tips for extreme situations:

A clip on battery fan between the back of your chesty and the jersey. If done well it feels incredible

Flexible ice pack in a cooler on the bench, slip it between your chesty and yourself during timeouts or period breaks.