There is no such thing as best it is a matter of personal preference or taste. You will have to experiment and find out for yourself. You should be aware that the lower the cartos ohms the more power it will want. A small batter such as yours is limited to the higher ohm cartos. I would guess 2.5 is as low as you should go. Maybe someone else will confirm this.
This.
You have to understand, not everyone has tried all of the different cartos out there and their opinions are going to lean towards what they've tried and what they think is best based on their experience.
I can attest to this from my own personal experience. I thought smoktech dual
coils were great...until I tried a boge. Now I've been using boges exclusively for about a month. Now I've been reading a lot about ikenvape.com's own custom carto creations and a lot of people really like them, so I've ordered a few of the different kinds to try out and see how they compare.
That's the best advice I can give you. Take the opinions you find and try a handful of each until you find what you like best before you order a massive batch of any one thing. I now have a bulk of about 80 boge cartos and I'm afraid I'm really going to like the ikenvape cartos more. Seems like a never ending process to me but whatever keeps you off the analogs...