What? That's kinda silly. You think any tank worth inviting to actually, y'know, tank something will think "sweet, I have +enmity, I can slack off on my spells and JAs now"?
No, and that's not what I said.
What I said is that there are people who do
think that, and unfortunately, they're fairly common. (Which is basically saying "there are a lot of people who play tank jobs that aren't actually worth inviting to tank things". If you disagree with that, there are bigger issues here.) Keep in mind that these are probably the same kinds of people who are liable to turtle up on PLD, or think that 'voke + Utsu is all that a NIN needs to do to tank.
As far as on mage jobs: I'm probably projecting my own tendency to pull hate more
often with Enmity- gear on than without it onto other people as well, but I don't do it on purpose
. I'm not sure if it's the back of my mind deciding to go a little more balls-to-the-wall than I would normally do, or if the Enmity- on a WHM is directly proportional to the square root of how sucky the tank will be. :-D
And I didn't say "minor uses" for Tamas. I said "minor exceptions to it being just a saving-you-inventory piece", which is also
different. It's not useless, or even situationally useful (it's pretty much useful at all times) - but it does essentially combine three rings' worth of stuff into one slot (an INT+ ring, a MND+ ring, and an MP+ ring - of which Enmity- appears on both of the former). Of these, you generally only need one facet at any given time (with max MP, you're normally doing buffs; and as far as INT and MND, the only
time you're needing both at the same time is pumping up Spirit Taker). Hence, it saves you inventory, but can generally be replaced with other rings (at the expense of both inventory and appropriate macros).