What U4GM Recommends for Diablo 4 War Plans and Mythics

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Diablo 4 Season 15 War Plans are easiest to judge by what your character needs next, not by which activity looks best on its own. A route that feeds you experience can feel productive until you need Glyph upgrades or boss materials. The same goes for Diablo 4 Items you're chasing: pick activities that support the gear goal, then check whether the rewards along the route support it too. ([news.blizzard.com](

How Do War Plans Work in Diablo 4 Season 15

A War Plan chains endgame activities together and gives you rewards as you work through them. Each activity also has its own progression tree, so running Helltide can eventually change what you get from Helltide, while Pit investment improves a different part of your routine. Whispers are the exception: they can progress alongside your chosen activities rather than taking an activity slot. Before committing to a route, look at both halves of the plan: the activities you'll actually finish and the rewards they lead to. A tempting reward at the end of a slow chain may be less useful than several solid rewards on a route you'll repeat. ([news.blizzard.com](

Which War Plans Activities Are Best for XP

Kurast Undercity is a strong starting point when experience and Paragon progress are the priority. Its activity tree includes ways to improve experience rewards and speed up beacon progress. Once the boss portal is ready, don't turn a quick run into a full clear just because enemies remain. Collect the experience orbs you can reach efficiently, then finish the run. Tributes give Undercity another purpose when you need to steer rewards toward specific materials.

Helltide is the better pick when you want XP without narrowing your session to XP alone. Cinders, Forgotten Souls, keys, and encounter rewards can all move a character forward. Its tree lets you lean into extra enemies and boss-related opportunities, or favor more dependable Cinder collection. I'd choose Undercity when levels are the clear bottleneck and Helltide when my stash is short on several resources at once. War Plans let both activities sit in the same chain, so that choice needn't be permanent. ([news.blizzard.com](

Where Should You Farm Boss Gear and Crafting Materials

Lair Bosses make sense once your build can clear encounters reliably and you're ready to spend time on targeted gear. Their tree supports boss-focused rewards, and a short boss session fits neatly between longer activities. Don't mistake a fast kill for a complete farming plan, though. If keys or other supplies are running low, Helltide can do more for your next set of attempts than another boss node.

For crafting materials, take a closer look at Nightmare Dungeons. The Escalation-oriented path offers longer, resource-focused runs, while other branches favor different loot opportunities. Pick the branch for the material you're missing, not because it was the right choice for your last build. That distinction matters most when upgrades start costing you more time than the dungeon clear itself. ([news.blizzard.com](

Is the Pit or Infernal Hordes Worth Running

The Pit earns its place when Glyph progress is holding back your build. Choose a difficulty you can clear cleanly; a harder run that drags on can leave you with less progress across the whole War Plan. Nodes that add upgrade opportunities are most useful when you're going to run the Pit repeatedly, not as an automatic pick in every route.

Infernal Hordes ask for a different calculation. They take a more sustained commitment, so I'd include them when I want their encounter rewards rather than treating them as a default stop between faster activities. They aren't a write-off: their War Plan rewards have been improved. Compare the full run against what your character needs before giving Hordes a slot. ([news.blizzard.com](

How Do Whispers and Splinters Fit Into War Plans

Whispers are easy value when they overlap with work you already planned to do. Their activity tree can improve what you receive from that side of your play, without making you replace an Undercity or boss stop. Season 15 Splinters add another consideration because each one modifies different activities. Check which Splinter matches your planned runs before investing heavily in a route; all three can affect Whispers. ([news.blizzard.com](

Final Thoughts

Build your next Diablo 4 War Plan around one immediate shortage. Run Undercity for focused XP, Helltide for mixed resources, Lair Bosses for gear attempts, Nightmare Dungeons for materials, or the Pit for Glyphs. Let Whispers accumulate along the way, and revisit your route when that shortage changes. Even if you're browsing cheap D4 items for ideas, check your build's actual bottleneck before starting the next chain.