May I ask what bikes you have and what the built cost you?

My main gravel bike is a Ceccotti RF25 gravel frameset (also know an SPCycle G056). I picked that up for about $400 USD during the 11.11 sale. I'm running LTwoo eGR which I picked up for $300 USD during the Black Friday sale. In terms of parts, I'm probably in the $1500-$1600 USD range including all the carbon bits and other components (lightweight cassette, carbon crankset, etc.). Depending on which wheelset+tire combo I use, my bike fluctuates in weight between 7.5kg and less than 8kg.

My other gravel bike is an older CX carbon frame that I use spare/leftover parts on. Even that bike in a 1x configuration is 7.9kg with a mix-n-match of Shimano & LTwoo groupset and whatever spare parts I have laying around.

If I actually took my gravel bike weight reduction seriously with higher end lightweight components, I'm sure I could build out a frame in the sub 7kg mark. 

You need to remove the coin, silly!
Sorry. I wanted to resist, but you tempted me ...
(Aka: Look what you made me do)

Just and armchair engineer diagnosis here: A few posts above, there is a picture of what seem to be spacers with the same pattern as the spider's interface. Maybe those have to be used? Really just guessing, I don't have the cranks.

Those photos are from BigRock crankset. I just recieved mine today and they came with spacers for spider.

From what I can tell these seem to be good quality and spindle isn't out of spec like some have reported to be the  case with other brands 24mm cranksets. I measured the q-factor to be ~146mm wich is ~1mm wider than advertised but it's still narrower than most cranksets offer.
Unfortunately I can't install them since bb I ordered is stuck in the mail sorting center. Hopefully I'm able to figure how to install them and chainline hits the spot.

I really like the features of this frame (tire clearance, mounting points, internal storage) but I'm looking for something with less aggressive geometry. Any suggestions?

I use Merlin CDR-2 wheelset but I guess the difference is in the spokes. And what 100 € wheels you're talking about? Off course carbon spokes are stiffer but everything depends on lacing and tensioning.

What kind of wheels did you had previous to using the Tagoola DAO50s? Interesting that you say that they are stiffer, do you have carbon spokes on the 100 euro wheels or also steel? for me the Carbon spoke wheels are stiffer than the Tagoola. Also with the same power output, only not the same speed.

on aliEx, look for promend m86c-ti or r87c-ti .
very light, sealed bearings, n removable pins. the pins arent sharp too