Do you like being a support?
Of course you do, you wouldn't be looking at a [Wisp] guide otherwise.
Do you like being super fast, shoot super fast, and be beefy?
Again, [Wisp] guide.
Then do I have news for you!
The build is straight forward. Dump a lot of stats into Strength and duration and dump on your range and Effic.
Now you might be asking why? Well let me explain.
1st Ability
Haste Mote - Fast af movement and attack/fire rate. Mo' STR Mo' Speed
Shock Mote - Just a bit of CC, damage goes up with STR but not enough to be important.
Vitality Mote - Thicc af. More STR = More raw HP and HP [Regen] for you and your team.
Being honest, this build does hurt other aspects of your kit, mostly being your 3rd skill.
This ability is still going to be strong in it's own right, you're gonna have to play with it in a more aggressive manner than if you were high range.
2nd Ability
This is your GTFO ability, or you can also use it as an extra form of CC due to Shock mote applying to your spectral image as well. When, and how you should use it is up to you.
3rd Ability
This is my favorite ability on [Wisp], and this build does not do it any favors. This is a blind and damage ability, the CC alone makes this a great skill, but the added damage procs you get from attacking the target make it so much stronger. However, since your range is going to be very low with this mod setup, you're going to have to use her passive (Which makes her invisible to enemies while you are airborne.) to be able to get into the middle of packs and hit it for max effect. The other method of applying this is to use this ability on your motes (1st skill.) Doing that will make the range doubled for that cast, but it's still not gonna be that far so just be warned.
4th Ability
Goku? But seriously, this is going to be the 'Dont touch this' button on the build. If you're into Helminth, this is the one to go as it offers no real synergy with the rest of her amazing kit. While this is really fun, it's in the end just not worth if you're playing a support style.
Cheap Route
There is a cheaper route if you're not wanting to dish out for the umbra formas, just replace them with their regular counterparts.
Those being Vitality, Steel Fiber, and Intensify If you're doing this version you are going to lose a bit of STR and some HP/Armor, but it will be mostly the same game play. You can also shave off a forma making the total four.
As far as arcanes go, run what you want, generally the tankier the better but that's up to you to decide what you need more.
So uh, I've got nothing left to add, so feel free to comment ideas/critiques on the build.
Thanks for reading.