I made a new topic to gather information about the new Vision fields so that I can keep the first post updated, instead of having to search through the old thread:
It seems that you have to replay the unlocker fields if you want the Vision field it gives, Looming difficulty is enough.
EDIT: The list is now complete and doublechecked, if someone wants to transfer it to the wiki it would be great.
Many thanks to @bilboCGL
V1 -> K3 Looming
V2 -> P1 Looming
V3 -> C4 Looming (MP only)
V4 -> D5 Looming
-----------------------------------
V5 -> L4 Looming (MP only)
V6 -> U7 Looming
V7 -> Q4 Looming
V8 -> J5 Looming
V9 -> Y6 Looming
V10 -> N6 Looming
V11 -> H4 Looming
V12 -> X7 Looming
V13 -> R6 Looming
V14 -> G3 Looming (it then goes on hextile F)
V15 -> A5 Looming
V16 -> G5 Looming
V17 -> W4 Looming (MP only)
V18 -> J4 Looming
Granted there's no point in doing them, but any ideas on 7,10,12 and 13?
Especially 7 and 13, I think he left a 0 off the starting mana or something. The others were pretty easy, but these guys get ugly for different reasons. Worse than the kill 8 shadows and spires with grade 7s one
V13: Pure green in the corner, Tower, set to random.
V10 is hard but not impossible - enrage the first waves for extra mana, ignore the manashard for a while. Setup:
Might as well drain it dry
Easiest seems to be 2r/bl/g plus some careful angering for mana, upgrade that to 5 then start farming with same gem x 3. Bolt, leak a bit, but survivable. Switch to yellow when you can afford an 8 and map is done.
I've tried V13 a few ways (and the others), it's close but not quite there yet, while V12's late waves are so ugly and V7 has the stupid tombs and a pretty steep creep curve...
Got V13, hit me that you can fit 4 amps on 2 towers and the creeps will still have room to path
Figured out the bug to exploit to beat V7: pure poison cheese (you have curse + beam which is all the poison for all the creeps--each beam hit gives full poison and +120% under curse). Quick test looks promising, but 3rd tomb did me in. So you want to anger the crap out of the early waves and get a grade 8 + amps + maze before that anvil drops.
V12 would be fine except for the fast high hp reavers towards the end, they're really, really hard to kill (wasps don't slow them down enough), so it's either them or the last of the normals that do you in.
V7 feels like not working as intended, meaning that tombs open too fast once several gems begin working on the same one.
Or it's just designed as claw-your-eyes-out hard, dunno. Usually die on 3rd or 4th tomb with typical y/b 3-4 towers with 2 amps.
Sooo close to the end of V7 with poison (add black at grade 8 1.4x base damage and not much off your poison amount if you have more than 10k hits).
Cleared all 4 tombs. Got some of the 200k giants. Last wave reaver got me, they're a few 10k, but I was just out of tricks. Sure I could have finished the 3 .5e6 giants, but those fast reavers are lethal when your fire rate is laughable.