This build is focused on Strength and Range.

Updated 19 July 2021

• As suggested by Alhazred, using Rank 7 [Adaptation] so as to drop 1 Forma Required. Change is minimal but if you have Rank 10 Adaptation for other Warframes, 5 Forma is still required.
• As suggested by FacelessAegis, you may replace Arcane Velocity for Arcane Pistoleer. Taking Velocity for additional DPS and personal preference.

1. Merulina HP scales off Strength and constant movement triggers her passive of 100% crit chance to secondary.
2. While on Merulina, you are only able to use Secondary, hence the [Pistol Amp] aura mod. [Coaction Drift] is there to further boost the effectiveness.
3. Riptide pulls in all enemy in sight for a burst damage, more enemy = more damage, hence the Range.
4. [Primed Flow] can be swapped out for [Streamline] for extra effiency, pushing the Energy need from 95 to 65.
5. [Adaptation] is there for extra survival capability.

I decided to forgo Duration since it only affects Sea Snares and Aquablades. Damage for both isn't really as impressive or even much of a utility as Riptide.

Arcane Velocity is needed for synergy, Arcane Energize can be swapped out for other Arcanes but I prefer more energy.

Riptide can be cast occasionally for the mob pull, else your main DPS would still be a good Pistol ([Kuva Nukor], [Cycron], [Epitaph])

I recommend using Dethcube with Energy Generator mod for energy upkeep.

You may Helminth away Sea Snares or Aquablades for Roar (Rhino) / Breach Surge (wisp) / Dispensary (Protea) but it's not really compulsory.

Config A : https://overframe.gg/build/179378/yareli/mesa-of-the-sea-config-a-strength-range-build-merulina-riptide/
Config B : https://overframe.gg/build/179845/yareli/yareli-steel-path-config-b-strength-and-duration-build-helminth-roar-merulina-riptide/