Lol Ensign, your experience coincides very well with mine. I'll just add that FoC Nec is nice to have because of several things: ability to spec into Prot Spirit / Aegis / SoA and have the energy to use it; ability to throw out Weaken Armour / Rend Enchants (although with 7 heroes the times I've needed Rend are very few indeed) / Rip Enchant; and importantly the ability to throw out AoE cover hex for AP in Suffering. The more hexes are out there, the less likely AP is to get removed. But I definitely agree the damage output is subpar. That's why FoC Necs aren't top tier.
If you're drunk at 2am you should give N/A Dark Aura touchers a try
@Plutoman - spirits actually follow target calls. I've not studied the phenomenon seriously and they don't respond at once, but to some extent they will follow your instructions. For Mesmers, the big problem is that there aren't many powerful non-elite Mesmer skills. The list is quite short: Shatter Hex and Shatter Enchant to a lesser extent, Mistrust, Cry of Frustration, Fragility (maybe), Wandering Eye and Clumsiness, Accumulated Pain and ... what else? Sure, there are other usable skills, but they aren't outstanding. That's why using Mantra of Recovery on Mesmer spells isn't very productive, and a big reason why Mesmers aren't God tier (for me anyway). Also many Mesmer elites are reasonable but not really worth looking at. VoR is a reactive hex, Shared Burden is a little eh, Lyssa's Aura is easily compensated for by having more energy management same as Tease, Fevered Dreams goes away once the target dies, and so on.
@LexTalionis - I think Dom Mes > Illusion Mes because Illusion Mesmers are necessarily constrained around Ineptitude / Clumsiness / Wandering Eye. You are forced to use them because Illusion Magic is so barren. And all three spells only work against physical targets. Dom Mes will always be useful, but Illusion Mesmers are very mediocre against caster mobs.
Main advantages of offensive spirits are that their damage output is extreme, you can have them placed down before battle starts to make the fight easier and they serve as great tanks in a pinch. All very powerful. Personally I see no reason not to use both Rits in a team, and if a third Rit were available I would seriously look into using it, too.