A complete description is always good when asking any sort of technical issue question. Saying that, I'll give it a shot, but without knowledge of what power application you have, and the rather limited build description... there's a good bit of guesswork going on.
30 gauge is a bit on the thin side for a 0.7Ω dual parallel build... unless the wattage value is pretty modest. With a mech mod at full voltage, your wattage output is 25w, and "heat flux" is 318 mW/mm2... not overly hot, but certainly on the warm side.
"Heat Flux" value is a representation of coil radiant heat, expressed in milliwatts per millimeter of coil surface area, squared.
If on the other hand, you've got a high output regulated mod, and you're "forcing" a higher wattage, say... 35 watts, it would bump the heat flux up to 445 mW/mm2, which is quite hot, and would vaporize the wick-in-coil
juice at a very rapid rate.
You may even have the
coils too tight on the wick, restricting wick-in-coil replenishment.
Regardless, you may very well have created a build that is "out of balance" with your wick capillary action capabilities, and even your
juice viscosity.
Click on the first and second siglines below and have a read. You may find in doing so, the cause for your dry hits.