I'm going to echo Reev and krc here since the "Stam Czar" was summoned.
I don't think the black heart is better than the skeleton key(at least I think that's wat Eisen was referring to), I mean... when the proc is up it is, but the proc's uptime is around 10%, so that significantly diminishes the effectiveness of the proc. However, it is DEFINITELY better than the corpse tongue coin just because of the raw stam on the trinket. However if you want to pick up another trinket, I'd suggest glyph of indominability to go along with your skeleton key if Juggernaut's Vitality is inaccessible to you.
The "situations" that they speak of where it may be better to have avoidance over EHP are currently 2 fold. 1 is gunship where the gunship captain can stack up quite a few stacks of his debuff if you are not dodging a lot, and depending on how little he misses you and the quickness of your DPS on the sorcerer, 1 dodge actually might be the difference between getting pulverized into the side of the ship or being able to successfully jump over to your boat. The other is saurfang, where since marks increase exponentially, it could become vital that you dodge/miss/parry an attack rather than eat it, since 5 dps might have to eat those shots too.
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