Silver N
This one is a bit hectic, but the theory is deny Vanya yellow, explode yellow with Bone Golem, away from being matched (very important), cast Necro on Bone Golem. Make BG as big as poss, deny Vanya more than 2 casts.
I did it at my 5th attempt this weekend after levelling this old one to 500 normally. Had 3 x Lamia rooms in a row, so made it to boss twice intact (did once with Lamia but used 3 x Vanya to beat it and only had Necros in boss room and 1 Vanya).
You do need to calculate Vanya’s damage when trying this one. Her normal damage is 130 + 4 per blessed troop. Let’s say you need 142 x 2 to be safe. 3 casts and all over for sure, 2 casts beats you at hoard 100, which I tried first off. I did it by getting Bone Golem higher than 2 casts of Vanya and 912 attack in meantime. Skulled all four AI troops down, after 3 replacement AI troops slowed me down. That’s the other issue, if Vanya summons another BG - it slows you down, and add in AI Necro looping. In one game it looped 6 times, 4 Necro’s, 2 Draugrs, thankfully that was room 1 without a Vanya and no harm done…
Crypt Keepers
I used 2 Morana, Grave Seer and Spectral Knight. I did it on about my 2nd or 3rd go. Knight I preferred one, to soak up excess purple and kill their Knight asap. Also more helpful in none boss rooms than a 3rd Lady M, imho. Others have used Nightshade.
City of Thieves
King of Thieves in 2nd slot. Tomb Robber is expendable at boss, KOT can grow behind her, AND Cedric will always get a shift in, putting him up top when you get there. Tomb Robber only when 100 gold, concentrate all fire on AI first slot, then after killing, skulls or 4th slot. Tier V rooms are extremely tough, I’d say borderline impossible without Cedric gold, or a gigantic hoard, especially Glaycion rooms.
Hall of Guardians
Is a great delve imho, best strategy, very rewarding to beat it. First one I beat.
Like the ideas, and the spreadsheet