Ideal wattage for tfv8 rba

I've had the tfv8 original for ages now. And just wicked the coils. After watching YT videos I believe they read about 0.28 to 0.29. I don't have a ohms reader and I've never used a non factory built Coul before. So I'd it ok to just stick it on my RX200S and vape?? And if so what would be best wattage range please??

My S5.

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