I'm just an old guy, so what do I know.
BTW, welcome to ecf Ben.
First off, I would question the equipment you are using.
Seems to me that you would want to be using around a 2.0 ohm coil for starting out with MTL vaping.
And, then probably just 7-8 watts for starting out.
Right now you are using DL equipment to do MTL vaping, and it just doesn't work out well.
(besides being expensive)
For example, I only use about 3ml of juice/day.
Being as I also DIY, that means that I spend virtually nothing to vape. (actually that comes out to 18 cents/day)
I mix @ 12mg/ml in 50/50 pg/vg, and MTL with a 1.8 ohm coil in a RDA (A7) @ 8-7 watts depending on battery voltage.
(mechanical mod) BTW, that mechanical mod is now about 11 years old.
So how much do you think it cost over time.
So think about it. Venders want you to buy equipment that keeps you coming back. (and spending money) The sooner you get out of that loop .... the sooner you can enjoy the savings that vaping offers.
Like I said before, I'm only a couple of months away from being 82 years old, and wrap my own coils & DIY my own juice. So if I can do it, surly you can learn to do it also.
So good luck, and most of all enjoy ..... it's a good ride.