Update!
Yesterday, I don't know why, but tried a 5 wrap 28g, ss316l in my oxva solo, it came out exactly at 0.6 ohm.
At 12w 180C in TC it produced a really smooth draw.
The 50/50 20mg menthol salt, however, almost muted and the throath hit was barely all that was left. It was still pleasant to vape.
Put in some 70/30 vg/pg juice, and come to realize that the juice that before tasted kinda awkward now shined to the fullest. It was good to vape it in mtl mode and even better in rdl.
Conclusion:
30g and up ss316l wire is really good in mtl, 2,5 ID will make very good to wick. The juice and ID you use depend on the ohms your wire comes out in. Thin wire ramps up real fast, to get the best out of it, a higher PG would be better, thicker seems to put a heavy wear on the wick and coil, plus the vapor production isn't sufficient to deliver satisfying flavour. ID 2, I would use with 70pg 30vg with a nic salt 20-30mg, since higher pg is more thinner and wicks better, 50/50 as I've found, isn't enough at that level of wick and ramp up, to supply the coil with an ID of 2, 2,5ID for instance accomodates enough wick for 50/50 juice to keep up.
So conclusion here, starting from 28g and thicker wire, I would go for 70/30 juice, with a coil ID of 2,5 and going from 24g I would even upgrade it to 3, if the chamber can support that ID, for my oxva, I don't know, I would stay at an ID of 2-2,5, plus thicker wire than 26g would heat up the entire atomizer, so I don't have a need for that.
Starting from 30g with ID 2,5 I would use 50/50, If I want to go lower on ohms and more twists I would go fot an ID 2 and use a 30/70 vg/pg ratio.
With 32g, I found out 7 twists and ID 2 to be perfect considering the flavour, if I would have wanted my wicking to last for a while longer, should have gone for 5 twists and a higher PG juice.
Considering ohms 0,8-0,4, ID use 70/30 lowe ohms I gather I should use even higher VG, but I think in arbiter solo, I wouldn't want to go that far. (wire gauges 28, 26, 24) ID 2,5-3
1-1,8 ohms 50/50, wire gauges 30, 32 ID 2-2'5
2-3.... wire 32 and thinner, ID go for an ID 2 and thinner juice 30vg 70pg.
Have to go trying out some other materials and wire types now, like ribbon or twisted moving up with the complexity.
So to get a great vaping experience, wire type, twist count, ID, wicking and the juice you want to use, have to all line up in harmonical coherence.
Twist count contributes to the surface area vaporating the juice, in means, more twist count-->larger ID, more wick....perhaps thinner juice....the twist count for me isn't all that important, it's rather to fine tune the vapor rate you get to the point where the wicking can keep up, or taking less twists to be able to downgrade to smaller ID for better flavour.
Thanks everyone for contributing to my knowledge to be able to experiment on my arbiter, it's been such a fun journey and more awaits.
I am dazzled about the experience I got out of a simple ss316l wire, thus I am even more exited about whats yet to come and I have learned alot and gained a little more skill thanks to all of it.
Have a blessed day everyone!