@andreidumitrescu nothing looks inherently bad with that build, to me, but it is hard to say.
It is hard to say what I would run that build at without actually vaping it, but chances are you can increase a few watts at a time and see what happens. Actually, if you are having an unsatisfying experience, then up to a reasonable limit and given the power you can almost always increase a few watts, take a test puff, and repeat as necessary. More watts isn't always better, but some builds just need more. Those look like a pretty beefy coils of a wide diameter and a not-small amount of wraps. Depending on the gauge of the wire
and the overall resistance, it doesn't exactly surprise me that it's ramping up slowly at 46W.
edit: I'm sorry, if I'm reading correctly then I see above you said it's .5 ohm resistance. Look at it this way: Eleaf's 0.5 ohm coil heads are rated for up to 80W. So if 46W isn't doing it, you definitely have room to go up in 2-3W increments.
Otherwise, what
@atroph said, the whole thing. I'm certainly not trying to push you to keep the claptons in there or use a particular type of wire. Stainless is nice (IMO) because you have the option of either temp control or not, but not everyone loves it or has it. If you are not a particularly experienced builder though, I agree with the above that it might be a good idea to make sure you are totally comfortable with more basic builds. I have been building a while now and still enjoy simple, round kanthal coils and IMO sometimes these really complicated builds don't pay off as much as it might seem. Some are good, and claptons aren't overly complicated. But there's nothing wrong with keeping it extra simple to start, or otherwise.
Sorry if my tone comes off as blunt at any point. That's just my writing style, but I do apologize.
