Welt is crazy good as a main DPS in DU. I’m writing this in a rush, so I might miss some key things, but below is a general flowchart/strategy plus some FAQs. If you have any questions, comment. I'll happily answer what I can.

Thanks to u/Lum_inesce for the strategy code:

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Team Setup

Welt
Sunday
Sparkle
Flex slot (recommended: DHPT or Hyacine)

Core Strategy

Give Welt as many actions as possible.

Prioritize:

Action Advance (AA)
Extra turns/actions

Over:

Raw DPS increases

More Welt actions = more delay, which means a much better chance at clearing the run consistently.

Blessing Priority

Highest Priority

Hunt
Erudition

These are your core paths because they massively increase turn frequency and action economy.

Secondary Priority

Once Hunt + Erudition are established, start taking:

Elation
Propagation

These provide strong general DPS boosts.

Important Miscellaneous Tips

Level up your Forges ASAP. They make your run.
Pick up the “Revitalization-310” Weighted Curio. It guarantees your Imprisonment lands. USE IMPRISON TO CANCEL BOSS EXTRA ACTIONS. THIS CAN BE CRITICAL!!!!
If you’re not fully comfortable with the run, grab defensive blessings early.

Best Masks

The top 3 masks are:

Cringe
Camera
Mecha

Good mask RNG helps a lot.

Laurel Crown Tech

If you get Laurel Crown early, play greedier.

It lets you skip Boss 2 for free, which is incredibly valuable.

Route Optimization

Use Herta-Cyrene to skip conversion domains.
Avoid combat whenever possible.
Skip:
- Combat domains
- Elite domains
- Aberration domains

FAQ

Are Eidolons Needed?

Not really.

The only major difference maker is probably Welt E2, but the strategy works fine without it. I showed my eidolons at the end originally for transparency.

What Other Weighted Curios Are Good?

Consider:

Silent Song — gives the team a shield on advance. Also "This Story Presently" for more crit damage to funnel for Sparkle/Sunday.

Are Domain Levels More Important Than Beacons?

Yes.

Domain levels matter much more. Beacons are mostly extra value unless you’re running Horse Mask, which honestly isn’t very good anyway.

u/maskedmybacon

Welt strategy for X8/X9 (with sample run).