In the genre of strategic tower defense games, Arknights stands out for its complexity, tactical depth, and rich operator mechanics. Rosmontis, a powerful six-star AoE Sniper, brings unique tile-based targeting and defense-ignoring attacks that make her invaluable in high-DEF enemy stages. While she’s strong on her own, her true potential blooms with a carefully curated support squad built to amplify her splash damage and hold enemies in place. In this guide, we’ll break down the most effective support units for Rosmontis and how to use them efficiently on high-defense maps.

Understanding Rosmontis in the Bigger Picture

To fully understand how Rosmontis functions and scales with support, check out our in-depth Rosmontis Operator Guide, where we cover her talents, skills, and modules. It provides all the groundwork you’ll need before you start building her team. Once you’re familiar with her splash mechanics and deployment strategies, it becomes clear just how pivotal her teammates are in helping her shine.

Why High-DEF Maps Challenge AoE DPS Units

Rosmontis excels at punching through defensive lines with her splash attacks that partially ignore DEF. These stages often feature clustered elites or drone-heavy waves that resist normal sniper fire. Her targeting system lets her blanket key tiles rather than lock onto individual units, making her less reliant on enemy density but more dependent on enemy positioning. That’s where support operators who control movement, apply debuffs, or regenerate her SP become essential.

Best Synergistic Operators to Watch For

A top-tier support combo starts with Suzuran. Her ability to slow enemies while reducing their DEF directly complements Rosmontis’s splash radius. Paired with Warfarin, who provides a potent ATK buff, the synergy becomes lethal. If you’re still learning how to manage deployment and map setups for these combinations, our Arknights Tips and Tricks guide is a great resource.

Frontline support is equally crucial. Saria works beautifully in stall-centric compositions where her SP generation can help cycle Rosmontis’s skills more quickly. In contrast, Mudrock is a self-sufficient defender who can tank entire waves while Rosmontis safely nukes from behind. Positioning them well can create that perfect kill zone that Rosmontis thrives in.

How to Maximize Rosmontis’s Skill Uptime

Skill rotations matter significantly with Rosmontis, especially if you want her third skill to carry maps. Elysium and Ptilopsis offer SP regeneration, which is vital during prolonged engagements. Combined with a low-cost vanguard opening, this creates a tempo advantage you can carry throughout the map. If you’re looking to speed up your grind and skill mastery, consider learning how to play Arknights on PC with BlueStacks, which offers key mapping and macro support for faster reaction times and smoother runs.

Best Support Teams for Event Stages

With limited-time events like the Thank You Celebration Event, you’ll often face high-density waves and tough defense values. Rosmontis shines in these scenarios with the right support. Built around AoE suppression, DEF reduction, and targeted healing to create a flow where enemies are always funneled into her blast radius. Angelina, Pramanix, and Shining are all great additions depending on the map’s threats.

Tactical Placement Tips

The secret to unlocking Rosmontis’s value is tile awareness. Place her where enemies consistently cluster, usually just before turns or on narrow choke paths. Your supports should function as anchors—stalling or redirecting enemies into that danger zone. Use slow casters or snipers who can chain crowd control while staying outside of enemy attack ranges.

Why Rosmontis Is Worth the Support Investment

If you’re looking for an operator who scales with every good decision you make, Rosmontis is it. Her role is niche yet incredibly rewarding when optimized. With proper team setup, she not only deletes elite units with ease but can also sustain that pace across long maps with heavy reinforcement waves. Check out our Arknights Currency Guide if you’re working toward upgrading her modules or buying elite support units from the shop.

Rosmontis’s value multiplies with good team synergy. Whether you’re clearing story stages or pushing late-game event content, supporting her splash damage with the right units is a win condition on its own. From medics and buffers to debuffers and stallers, her ideal team isn’t just about holding ground—it’s about building a perfect kill funnel.

And if you want to enhance your gameplay experience further, don’t forget that BlueStacks offers the best way to play Arknights on PC. With enhanced controls, multi-instance support, and optimized performance, it lets you execute Rosmontis’s plays like a true strategist.