But lets take away the attack power of the NS, or the 5 super rapid spam skills of an archer...or the titans HP, and see how they like thier character thrown down in the dirt.
Err, completely no offence here, but maybe you should level up, get some proper gear and learn how to buff up. Your points were attack power of NS, rapid/spam skills of Archer and HP of a titan. Well, you have all 3 really.
Who hits harder than a Sin's Deadline? Sure, you may have a 42 sec cooldown on it now assuming you only have 30% Cast, but once you get more Cast, there is nothing capable of taking down a target as fast as a Sin on 100% Cast. That basically covers NS attack.
As for rapid/spamming skills, have you seen Deadline on 100% Cast with Haste2, maybe also add a Witch Soul for some laughs?
And lastly, check the 175 Sins with a good build and enough resources to fund them, you'll rest assured the HP of your class does not lose to the HP of a Titan. If you personally do, you might want to work on your stat build or your gems.
Either way though, this thread is not regarding what's your attack, or how you feel when the NS kills more Morakes than you, the point here is if it is logical and fair to make Sins/Rangers who are currently Invisible be affected by AoE's.
And even then, if you're telling me that being able to be hit while Invisible is such a major, revolutionary nerf, I would have to disagree, it would merely separate the noobs from the people who actually know what they're doing. Plus, the real effect of this can only truly be examined with PvP, not PvE, and as you said yourself "I don't really do pvp, but I do pve...."
And as to your reply to my analogy of how if you were in a building, invisible or not when I blew it up, you'd be gone, and you said if I were there to blow it up, I would be too is irrelevant. Fact remains, Invi or not, you're gone.