As for coils.. with that mod you are pretty much limited to the baby beast M2 coils. Higher PG will thin your juice for better wicking. Hate to say it, but with that mod kit Smok is saying "Here, vape this. Don't like it, well to bad" It's kind of like buying the 'lite' internet package at 512k and trying to download movies. "ARRRRRGGGGGHHHHH!!!"
Good news is, the baby beast will accept other coils. Bad news the Priv v8 won't power them properly.
So if increasing the PG to VG ratio doesn't work, you may have to bite the bulllet and buy a new regulated mod.
I am also curious as to how you are hitting your vape enough to dry the coils.. BB have huge juice holes. Maybe increase your nic/ml by 3 so you puff less often.
On the other hand, since the Priv V8 has a standard 510 thread, you can also buy an RDA, make your own (or use premade cois) and drip juice as needed. Just be sure to study ohms law to know what resistance you need to use. I believe that Priv V8 has a 3000mah /20A battery, so 0.20 ohm would be right at the CDR (constant discharge rate) of the battery) and as low as 0.15 ohm would be acceptable. (0.20 being recommended)