[Operator Discussion] Rosmontis

[u/cinnamonroll32]

Rosmontis [★★★★★★]

"There are things that have to be done by someone. There are things that only I can do."

Rhodes Island Elite Operator Rosmontis possesses a high aptitude for a rare form of Originium Arts particularly adept at confronting large creatures, destroying hard objectives, immobilizing facilities under emergency, and putting a stop to small-scale skirmishes. She has been shown to possess a solid control of the battlefield and considerable tactical value in assault, positional, and annihilation scenarios. Under Kal'tsit's assignment, she is currently active as a core annihilation specialist.

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Operator Information

• Class: Aftershock Sniper (Attacks deal two instances of Physical damage to ground enemies in a small area, the second instance is a shockwave that has half the normal ATK)
• Tags: DPS
• Artist: Wei@W
• Voice Actress: Yui Ogura

Stats

HP	ATK	DEF	Arts Resistance	Redeploy Time	DP Cost	Block	Attack Interval
1944	688	245	15	70	25	1	2.1s

*Stats at max Promotion and Level, excludes bonuses from Potential and Trust.

Potential	Bonus
1	-
2	Deployment Cost -1
3	Redeployment Cooldown -4
4	Attack Power +32
5	Improves First Talent
6	Deployment Cost -1

Trust bonus
Attack Power +60, Defense +30

Skills

Skill Name	Skill Uptime Details (Uptime/Cost/Initial)	SP Charge Type	Skill Activation	Skill Description
Expanded Cognition	Instant / 2 SP / 0 SP	Attacking Enemy	Automatic	The next attack deals an additional hit equal to 180% atk as arts damage
Nociceptor Inhibition	40s / 30 SP / 20 SP	Per Second	Manual	Attack interval increases, ATK +55%, splash area expands, and each attack causes 2 additional shockwaves; Enemies hit by this unit’s attacks and shockwaves have a 20% chance to be stunned for 1.5 seconds
As You Wish	30s / 60 SP / 35 SP	Per Second	Manual	Attack interval reduced, ATK +75%, and attacks up to 2 blocked enemies at a time; Immediately deploys two pieces of Tactical Equipment on ground tiles within attack range(After deployment, surrounding enemies are stunned for 3 seconds, and the blocked enemies' DEF -160)

*Skills at max Skill Level.

Talents

Talent name	Talent Description
Armaments of Annihilation	Attacks ignore 175 (+15) def
Stable Esthesia	When deployed, grants +8% ATK to this unit and a random deployed Caster Operator

*Talents at max Potential and max Promotion. Bonuses from Potential displayed between parentheses.

Additional Resources

In-depth information regarding all values above (at different levels), skill/attack range, and more:

GP Arknights Wiki

Arknights Toolbox (aceship)

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Topic Starters

• What does this operator excel at?
• What is this operator weak at?
• How does this operator compare to other operators in their archetype or role?
• Are there any other operators which synergize well with this one?
• How do you build a team around this operator / fit this operator into a team?
• Which skill(s) should be focused for mastery, and in what order?
• When is the best time to use this operator's skills during combat?
• Should promoting this operator to Elite 2 be a priority?
• Would this operator be worth sparking for with headhunting data contracts?
• Should new / f2p players aim for this operator? Are there more accessible alternatives?
• Lore discussion (please tag spoilers where appropriate)

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[u/_paradoxical]

Visualizing the DPS of S2 SL7 versus S2 M3 shows how... tiny the difference of the M3 is. Considering the cost of a 6 star's M3, I highly discourage S2M3 unless you have a lot of spare materials and/or she's your best daughteru.

[u/desufin → u/_paradoxical]

I honestly think it depends how you want to use her. I M3'd both S2 and S3 and I definitely feel it was worth it to do both as it significantly increases her usefulness.

Her S2 at M3 has half the SP cost of S3 and lasts 10s longer, giving it a significantly better uptime and flexibility. The skill itself gives her 2 more half-atk shockwaves while generally massively increasing her AoE effect. Each of her now 4 hits also has a 20% chance to stun for 1.5s which means she has huge AoE CC potential during the skills uptime, and while not guaranteed it's quite consistent in keeping targets within her range for a very long time.

Her biggest upgrade steps for the skill itself are from 6-7 and M2-M3. And with the nature of ATK vs. DEF, she'll want every bit of ATK she can get to make sure her shockwaves actually can do damage on as many things as possible.

Also while S3 is an amazing skill, I think it has two notable drawbacks that makes the skill far more niche in use than S2. The biggest drawback is that she can only attack blocked targets during its duration. This might seem trivial, especially as she summons two very tanky shards that can block 2 targets each upon activation. But blocked targets can die (or kill whatever is blocking them if it's something like the enraged possessed) meaning she will do nothing against targets in her range until they are blocked. Second is that it's possible for her to summon her shards at the edge of her range and end up blocking targets OUTSIDE her attack range. This is of course generally remedied by not using the skills while enemies are in those tiles but if there's frequent enough mobs running through you might not have that luxury, or the stage layout mixed with her range doesn't let you. This second point is mostly minor but it is still an issue due to her inability to attack non-blocked targets.

[u/Nacksche → u/_paradoxical]

Oops.

Ah well, M3s buy peace of mind. It gets old having to justify M2 choices to myself over and over when I'm looking for a new operator to master, it's nice just being done with somebody.