The thing isn't that the soul reaping change was that crippling... it's just that it happened all at once, and everyone was whining about it.
Anet's forced to make a change because of the sheer volume/force of the Necro response, where with Mesmers, all the whining has been coming since day 1 of release, as people struggled to be effective in PvE with their mesmers.
Sadly, I think Necromancers are just more effective than Mesmers in so many ways. They can't shutdown, true, but so many necro skills have effects that come in pairs... Degen along with damage. Healing along with a minor degen cover hex. Self healing with degen, all on skills with some combination of lower cost, shorter cast, shorter recharges & longer durations.
To get back on topic:
Me/Any - PvE Mesmer Build
9 Fast Cast
Equip: Dream Haunter + Straw Effigy (Illusion), Armor with 1x Attunement rune.
Images of Remorse
Rez or Illusion of Weakness
Status: Trouble with energy despite bringing relatively low cost (less than 15) skills and a single energy management. Trouble hits as Energy Tap is recharging, and in a one-minute battle, there is about 5-15 seconds of inactivity. More if a battle drags on and there is no time to recoup. Inactivity over 1/6th of the time, by loose estimate.
Have used Mantra of Recall, but there are timing problems with the energy management there, even if it provides more energy.