Sorry I think I disagree here.
The aspire 1800 mah can safely vape at 35 amps according to Mooch's charts (and matching closely to aspire's claims of a 40 pulse).
Bear with me here.. the alien is a bit of an anomaly, as it discharges the batteries all the way to 2.8 v.. most mods are 3 or 3.2
So using mooches regulated mod calculations, at 220 watts, the alien would require 39.3 amps. (110/2.8).
This is too much for the aspires..
So i'm going to say, allowing for 5% tolerance, that with 2 aspire 1800 mah, (check they are genuine), one can safely vape in the alien at 190 watts.
This does not mean continuous, i mean 5 second pulls then a 5 second break at least..
For continuous vaping, as long draws as you want as often as you want, I rate it at 160 watts using the aspires (again allowing for ~5% innacuracy/variance).
With vtc5a's, 160 watts will be fine, or 140 continuous.
On a mod that cuts off at higher voltages, even higher wattage is fine.
in a dna 250, i'd feel perfectly safe with 3 vtc5a's at 250 watts. I would not use ANY battery less than that.
But we also now should talk about saying there are no batteries that can handle 220w.
LG HB6's (PINK!) can *almost* handle it, even at CDR which is 32.
What's more, they pulse to 40 safely.. (higher in reality, but we are using mooch's max safe vape amps chart, which takes into account the average high wattage vaper's usage habit). I would say here right now, you can vape at 220 watts, in an alien, with pink HB6 batteries. You will get terrible battery life, but you can do it.
I will also say, that you can vape at 2 hundred watts in an alien with samsung 20r and Sony VTC3
I follow mooch's every chart and test, and I have also purchased a lot of vtc5a's from a well respected ebayer from the aussie vape forums who does his own every extensive testing, and he thinks each vtc5a can safely vape at 85 or even 90 watts.