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.


Fatal error: Uncaught Exception: 12: REST API is deprecated for versions v2.1 and higher (12) thrown in /home/ecigkiss/public_html/wp-content/plugins/seo-facebook-comments/facebook/base_facebook.php on line 1273