What? 155 MORE mana for nearly 2/3rds less duration, which makes it even MORE mana intensive/inefficient. Why would you do this? Boltran's should literally only be used for 52s and 53s. And you can't get tash+allure off in a single color stun? Stun lasts 8s, tash is 1, allure is 6, GCD is 1.5. I mean, I guess you can get frontal stunned in that .5s window, but it's rare and I've never had a non-frontal stun interruption in that .5s difference. Plus, why the fuck are you tashing EVERY break? Shit lasts 12m, almost as long as Allure and basically the duration of 2 Boltran's.
And yeah, some mobs do have pretty insane DPS differences, especially if going to a 53 means you get something that backstabs or whatever. My issue isn't that Boltran's should NEVER be used, my issue is that it's a pretty fucking shitty "upgrade" to Allure and only really useable under pretty specific circumstances/scenarios. And to make it worse, you don't get a fucking upgrade to it until goddamn PoP, by which time charm is starting to lose effectiveness anyhow.