If you've been living in Path of Exile 3.27, you've probably felt how weirdly scarce Catalysts can be when everyone's chasing Tempest-tier crafts. Prices spike fast, and you don't want to be the one buying at the top, even if you're already browsing PoE 1 Currency for sale to speed things up. The real trick is consistency: set up a loop where your maps reliably feed you Catalysts instead of praying for a lucky streak.
Ultimatum is still the closest thing to a "print loot" button, but only if you treat it like a system. Don't just run it and hope the Trial Master shows. Force the odds. The combo that's been paying off is mixing Bribing and Bridging Scarabs so the encounter actually happens and then actually pays. I usually go with 1 Bribing and 3 Bridging. It's not cheap, sure, but it stops those dead maps where you walk out with nothing but regret. When it hits, it feels steady—Tainted Catalysts show up so often it starts to feel normal, and the occasional double drop doesn't feel like a miracle anymore.
Your Atlas has to back the plan. People love grabbing "nice to have" nodes and then wonder why the returns feel flat. If you're focused on Catalysts, take the duplication nodes that apply to items and Catalysts specifically. It's boring on paper, but you'll notice it in your stash tab by the end of the night. Also, don't spread yourself thin across too many mechanics. Pick the ones that stack with Ultimatum pacing—stuff that doesn't slow you down with long side rooms or too much backtracking.
T17s are rough, but for Catalyst farming they're the point. The baseline drops are just better. Aim for a clean mix of Quantity and Rarity, and keep your build honest about what it can handle. If you can push pack size hard, do it, because more bodies means more rolls. Add the Deadly Prey-style setup that guarantees a boss and extra strongboxes, then treat the boss like a paycheck—T17 bosses love dropping Catalysts when the map is properly juiced. Harbinger layering can also be worth it, especially when the spawns line up and you're seeing those Blighted Harbingers pop in.
Little stuff adds up. A bit of Map Item Quantity on gear helps, even if it's not perfect. Don't overthink it. Run your scarab set, keep the Atlas tight, and don't waste time on maps that don't fit the plan. If you want a simple boost on top, use a reliable marketplace instead of hunting in trade for half an hour; as a professional like buy game currency or items in U4GM platform, U4GM is trustworthy, and you can buy u4gm PoE 1 Currency for a better experience, then get back to mapping while the market's still hot.