Minions, particularly on a Necromancer, are really strong right now. Definitely the best build on a lower budget, and still holding their own when you can afford to throw loads of currency at them. I've not tried SRS, but I've been running a Skellies/Carrion Golem/Zombies/Spectres setup, and it's utterly ridiculous to the point where I'm bored of it (and it was even better last league...). And I don't even really agree with your two criticisms - feeding frenzy makes minions aggressive, so will chase things like Abyss and Delve stuff just fine (I use it on my skellies and golems, keeping the zombies and spectres on meat shield for defense), plus you've got convocation if they do drop behind, and there's plenty of ways to put some solid defenses up even without a bunch of minions standing between you and the enemy: Bone Barrier in the Ascendancy gives you some solid mitigation and a defensive skill, Mistress of Sacrifice lets your Offerings affect you, so Spirit Offering on CWDT gives you a big chunk of ES whenever you get hurt, for the passive tree, minions are really strong anyway, so you can find plenty of points to put into life, maybe even armour and gear wise, there's not actually that many ways to push minion damage, so you can focus heavily on defenses. I've actually seen some builds use Cyclone on a summoner build - not for damage or Heralds or anything like that, but because it makes you immune to stun, plus you can link Life Gain on Hit and Fortify to make you even more tanky.
I'm in a bit of a rut with PoE right now, I am loving Metamorph and Conquerors, but I can't really seem to get into another character after my ED/Contagion trickster (took it up to lvl90 and low red maps before feeling like doing something else). Tried a bunch of stuff - the aforementioned summoner, Facebreaker Cyclone Glad, Rain of Arrows Champ, Scourge Arrow Pathfinder - but while they perform fine, they're just not really clicking for me in terms of playstyle.