I really don't understand your numbers. How could a 6Ω resister added to the mix possibly work?
If we start with 7.2V and a 2.2Ω atty we get about 22 watts (ouch). Adding a 6Ω resistor (8.2Ω total) we get 6.3 watts, but isn't the 6Ω resistor dissipating 73% of those watts leaving the atty itself at a paltry 4.6 watts?
Adding 1Ω to the mix makes sense to me. 7.2V @ 3.2Ω = 16.2 watts. The 1Ω resistor is dissipating 31% of the watts leaving the atty at about a nice 11 watts.
Am I not understanding this correctly?
The OP was supposedly using a 10ohm resistor, 500ma considering the atty(I don't call that good vaping).
edit for weekend drunken posting
You are correct, I was going on what the OP had stated. I still don't believe his final resistance was 10ohms, I was just giving examples close to his. For me, if I'm going to waste half the power through a resistor, I don't see the point unless it's something that is already built, in which case I'd just go for an HV atty. There are plenty of high power low resistance thin film resistors, choose which would best suit your vaping style. With regular 510 attys I like closer to 5w, 4.2v ~ 2.9ohms is nice. I just played on my bench and putting a 2ohm in series with a TW 2.9ohm 510 atty worked well for 8v and still ok at 7.2(remember charged lithiums start out at about 4.2v). That same resistance on a 2.5ohm E2 r4 carto tasted like crap.I went to a 2.5 resistor and it was kosher. It's whatever floats your boat, but I do think 11w would be mean.