I am slowly wrapping up this league (ok, maybe not) and I'd love to hear what builds you've tried and your experience with them. Here are mine.
Most builds have somewhere between 100 and 800 div invested but it's difficult to estimate because I craft my gear and the prices hugely fluctuate throughout the league.
Necro DD
This was my leaguestart and in hindsight was a mistake. I should have started with CoC DD, which seems better in every way. The build got me through the campaign and got my 4 voidstones though so everything fine. I ended up not enjoying the button-heavy playstyle and the damage seems to plateau rather early compared to other builds at similar levels of investment. Not really recommended.
Frostnova Archmage Hiero
Extremely smooth on a reasonable budget to do all content. Great mapper. Biggest downside is the visual clutter. It's hard to see what's happening on the screen, which is doubly worse when you are expected to dodge DD or death effects in T17s. I personally didn't enjoy the leech playstyle that much, you are essentially dead the second you take your hand off the button, and sometimes that happens when it lags. Steelmage's version with spell suppression would've been tankier and I probably could've pivoted into that to make it stronger. Highly recommended. Would do again if not nerfed.
Splitting Steel CI Trickster
Amazing build that can clear nearly all content. I can completely facetank Ubers and T17 bosses and bossing is where it shines. I still have to roll my T17s for specific mods or I may get one-shot by rares with a dozen modifiers. The main downside is that T16 map clear doesn't feel amazing. You can run Oriath's for explode and something like Awakened Fork for better clear, but it still isn't the best for that. If you just want a T16 farmer, there are many better and cheaper builds. Also, the build sucks at low investment. Don't start it unless you have at least ~700 div.
RF Chieftain
Never played much RF before and my wrist hurt from the league mechanic. Chieftain is super comfortable for RF and the clear is amazing with the explosions. It explodes the whole screen. While it can scale to T17s it's a bit more expensive to do so than other builds are. I use it for T17 farming, but I have to heavily roll the maps for it, and bosses can be a pain. Though to be fair, I never did the gem swap with fire trap in the body, so I was missing a lot of DPS. You'd probably need around a mirror or so to make it comfortable in T17s and get some great adorned jewels... 12 of them. But a super chill farmer otherwise and basically invincible in T16s. Hands down my favorite build, it's just so chill and the whole screen explodes. I'm even debating purchasing MTX just to make it look nicer. Highly recommended.
Holy Relic Necro
I abandoned it earlier than expected due to FPS issues with the skill. I can't judge the high budget version but I have a medium investment one with adorned and MB. It's the most amazing mapper. It full clears the whole screen on T16s even on a low to medium budget (~50d). One of the smoothest and most value builds I've ever played. I did run some T17s with it and they are fine, but similar to RF I feel like I have to be quite careful with rolling and the is somewhat harder to scale than other builds. The most annoying thing about the build is Animate Guardian (AG). AG is just too squishy to do super juiced T17s, and it sucks when it dies with expensive gear. Some people run spectres, but I didn't try that. I'd give this 10/10 if it wasn't for the AG issue. Highly recommended. I unfortunately expected this to somehow get nerfed next league.
Wardloop
Never tried Wardloop before but since I loved RF so much I thought I'd give a real no-button autobomber a try. It's decent but I ended up being a bit disappointed with the squishiness and annoyances around enemies with temporal shield and mana leech that brick you. It's not like you can remove them from the map by rolling it. It's both super tanky and super squishy at the same time. I still die in juiced T16s if I don't pay attention. But not paying attention is exactly why I want to play an autobomber, and RF IMO does a better job at that. The visuals are also a bit much for me. I still recommend it and it's super satisfying when you get it work though. I didn't want to invest more because I don't think the issues go away at much higher investment.
Stay sane, exiles.
Detonate Dead of Chain Reaction
Awakened Fire Penetration
Awakened Elemental Focus
Hypothermia
Energy Leech
Intensify
Concentrated Effect
Haste
Divine Blessing
Molten Shell
Cast when Damage Taken
Flesh Offering
Elemental Weakness
Flammability
Desecrate
Spell Cascade
Faster Casting
Blood Rage
Shield Charge
Faster Attacks
Flame Dash
Determination
Defiance Banner
Tempest Shield
Grace
