Simple guide to nightmare sigil affixes in S13

Just a little guide but depends in personal preference.

Listing the sigils affixes that are worth running, the rest should be transmuted in cube to get an Escalation sigil. 5 bad sigils in the cube to get Escalation, itwill give much better rewards in general, does not matter the affix, it will influence only the first stage and there are 3 in total, the other 2 are random and stage 2 will get 2 affixes and stage 3 will get 3 affixes. Escalation sigils can also roll ancestral, for more difficulty and even more rewards.

Godly tier

these ones keep them aside for when you are sure to be able to run T12 smoothly, possibly in party to get more drops

• Mythic Prankster
• Treasure Breach

Great tier

• Horadric Strongroom: run it whenever you can, in party can be easier to reach max tier. The final chest in the horadric portal drops tons of everything and also escalation sigils

Good tier

• Vile Splendor: gold is in HIGH demand this season
• Materials Reserve: everything you need for crafting, worth it.

Meh tier

• Ruby Reserve, Sapphire Reserve, Skull Reserve, Topaz Reserve, Diamond Reserve, Amethyst Reserve: gems are badly needed, but the drops from dungeons are not great. At least these ones let you choose which type so it can be an option, especially with a whisper attached

• Gold reserve: if you are REALLY desperate for gold, vile splendor is way better.

"Merge to escalation sigil" tier

• Gems reserve: only if you really have nothing else to run and if there is a whisper attached. A run to seer dungeon, even without sigil would give much more fragments in royal gems.
• Obols Reserve: it's subjective, would be in Meh tier if the cap was not so obnoxiously low. One run here will force you to go back 1-3 times in city to buy stuff and use the obols, because in 2 chests at T12 you reach the cap. Don't take too much time, obols disappear pretty fast also. You also can only get up to ancestral legendary, perhaps some GA. You will never see uniques and mythics on the purveyor this season. TLDR: waste of time, even if they raise the obols cap. Will be relevant only when purveyor starts again to give uniques.
• Equipment Delve: i still have to see what is improved after getting all the horadric artifacts. waste of time.
• Hidden Armory: only if you are desperate for extra chance for ancestral GA but it's kinda unreliable, i think they removed it from the pool.
• SHRINES: nothing to gain whatever the type is. Even greed would be bad. Only use case i can think of is some affix combo in war plans that interacts with shrines and goblins but it's really convoluted to set up.
• Dungeon Delve: adds nothing to the dungeon

will update if there are some strategies that can change the tiers