Generally speaking the lower the resistance, the more power you can throw at them. More power generally equals more heat. If you are still using cigarettes, or recently stopped then a nice hot vape might be what you want. On the other hand if a hot vape is not what you want then a higher resistance would my suggestion.
I just got my crown tank in a few days ago, tried the stock .25 coil it had in it, too hot for me at 30 watts or more, and only producing little wisps of vapor. Using a menthol crystal DIY liquid that little wisp kicks like a mule however, will need to make a MUCH weaker batch for that tank/coil.