There are a few different builds I run for Dr. Finn depending on the situation. The heal focused build is a good all-around build meant for maximum team support and survivability.
This mod allows Dr. Finn to increase his overall healing. If you manage to get all 4 enemy players with Water Spout, this can increase Refreshing Spray up to 32 to each ally. All this extra healing can add up over the course of the match and can really make a difference in your team’s sustain. The most recent Water Spray determines the healing bonus even if other abilities are used between.
This ability really shines when you heal multiple allies at the same time. A weakness with this ability is it does not heal Dr. Finn as much as it does his allies. Since Dr. Finn does not have a dash to escape, as other freelancers do, he becomes an easy target. This mod gives him the self-sustain he needs to say in the fight to keep supporting his team.
Due to the cost of the other mods, I don’t run any mod on this ability. These mods are easy to sacrifice when playing a heavy support build. The eels already do good damage and reveal on their own. See below for the alternative build Ally Eels.
Being able to cast your ability through walls opens up a lot of options for saving your teammates. With good positioning, through walls shouldn’t be needed as often but sometimes it’s out of your control (such as knockbacks/roots etc). This mod ensures that you’ll be able to get the shield on them when you need to.
I do switch this mod out with Unstop-bubble when facing heavy CC teams (see below for unstoppable build).
This mod provides a good amount of self-sustain for Dr. Finn since he is an easy target. You can easily hit multiple enemies with the ultimate giving himself a pretty big self-heal which can swing a fight.
Catalysts are pretty basic for Dr. Finn. With the built in self-sustain with the heal focused build, I can take Brain Juice. However, if you choose to run mods that don’t provide any self-sustain, Second Wind is a great alternative. Shift and Fade can either be used depending on preference.
Being able to cast Electrifying Eels on allies gives Dr. Finn more options during a match which can be handy when no enemies are around. While they can be nice, they can jump to allies who are invisible and give away their position. It will also hit the closest target regardless if it’s an ally or enemy which can prevent important damage and reveals. I would avoid this build when you have members of your team who have abilities that can make them invisible or fade.
This build gives you an unstoppable to help counter heavy CC teams. Because the Unstop-bubble mod costs less, it allows you to pick up the extra damage eels for 1 point.