When I made the 1/3rd of Ascendant vs 3/4th of Elementalist comparison, I didn't mean it in a literal sense of comparing the strength of each ascendancy point. I was thinking more about the whole package of the Ascendancy. Ascendant basically has the most important bonuses that the new Elementalist has:
-1 Golem
-10% Penetration
-stronger Heralds (which is nice for coldbuilds who generally clear screens with HoI explosions, and the new HoA for incredibly high overkill prolif)
-Reflect Immunity
-10% more multi from Shocks
It immediately jumps to the eye that Elescendant has bonuses from more nodes than you can skill as a true Ele. You get the arguably best bonuses from Liege, Paragon, Mastermind and Beacon. A real Ele has to skip either one of the big ones (Beacon/Mastermind), or lose the two small ones (Liege/Paragon).
The nodes before Mastermind/Paragon are incredibly bad. Pendulum is a 37.5% increase to damage, and most self-casting elementalist builds aren't even using AoE. Frostbolt, Freezepulse, Spark, Arc. There are a few where AoE is used, but having too much actually becomes a detriment. VD, Firestorm, GC. Few of those are being played as self-casters, or their scaling is generally too shitty to be able to clear T15. That leaves us with a few niche-builds that may actually benefit from the entire node, but it's still not worth it because 70% aoe every few seconds isn't going to make a difference once you already got the 54% off the tree.
Conflux is near worthless on clearing because you're going to build around clearing in 1-3 skill uses already. Having big schocks/ignites/freezes doesn't help there at all. For bosses this node is really just an enabler for Beacon to reliably apply max duration 25% shocks. Ignite without investment is a non-factor, you already get the big shock thanks to Beacon and while chilling is nice when combined with tempchains/enfeeble, you're going to be hardpressed to get enough survivability without MoM.
Which leads us to the Elescendants unconditional 10% Penetration, whereas Elementalist has to actually reserve mana for a Herald. The only way you're going to get decent survivability on the top-side of the tree is by either investing almost entirely into life, MoM, or Hybrid. Playing hybrid without any sort of energy recharge/base ES/leech or regen from the Ascendancy is a no-go, so there's really only two left, and you're shooting yourself in the foot by having to reserve more mana than necessary. Lastly, penetration is highly overrated because it is so easy to get even resistant mobs/bosses to negative resistance already, at which point additional penetration becomes a linear damage increase with diminishing returns, and no longer an exponential one. While you could free up for example a flask slot, ascendancy points have by far the highest opportunity cost, so you'll more than likely sacrifice MoD instead.
Your best bet as an Elementalist right now is to go Liege+Paragon, Mastermind OR Beacon. Liege+Paragon simply provide better survivability and utility than either of the other double-notable pathings. I would argue that almost all builds will go for Beacon instead of Mastermind, except for maybe Autobombers (which are still better off going Assassin), HoA Overkill builds (which get more herald effectiveness from Ascendant or Overleech from Slayer) and freeze-builds that plan on clearing with HoI shatters (which, again, get better bonuses from Ascendant anyway). Which leads us to comparing what's actually left in favor of Elementalist.
-15% more Damage from Beacon Shock (25%, but Ascendant gets 10% too)
-40% Eledamage and 40% Damage from having 2 Golems
-18% all Res (which while nice doesn't really do anything for high-tier builds that overcap hard anyway)
-5% Freeze/Shock/Ignite Chance (ignite is useless without investment, shock will be up almost 100% thanks to conflux rotation and bosses are pretty much immune to Freeze due to their HP Pool)
-50% Golem effects - I reckon most people will be running at least a lightning golem and more than likely a chaos or stone golem for survivability, so that's a whopping 5% cast/attackspeed and ~60 liferegen
-0.5% Eleleech as Life, which while nice will not enable you to leech through bosses, and will do little on trash unless you consistently die to whitemobs for some reason
-some fancy Conflux that ultimately does nothing due to the new Beacon
So 15% more damage, 80% increased damage, 18% res, 5% ailment Chance, 5% cast/attackspeed, 60regen, 0.5% leech. Leech is nice, 80% damage is a lot, and the 15% more from applying shocks is great not only for yourself, but groupplay. But that's all there really is to this ascendancy now, generic elemental damage, some more% that applies to the whole group and a bit of lifeleech, you don't even get manaleech. The remaining bonuses aren't really worth mentioning in my opionion, because point for point they're basically the same as what you'd get from a regular node off the tree. Everything else that's fairly important to Elementalist, you get as Ascendant too. You also get 5 Passive Points, some stats (which are nice to have since witch generally struggles very hard to reach strength or dex requirements of lv21 Gems without having to pick the 30str/dex nodes, so this usually frees up at least one additional shaper/elder suffix or passive point), a free starting location and a whole 'nother friggin Ascendancy. Sorry, but except for extremely niche builds, Elementalist is just straight up worse compared to Ascendant with Ele+X. Ele+Slayer, Ele+Deadeye, Ele+Inquisitor or Ele+Hiero are all valid options, and they're all miles better than the original Ele because the tiny bit of stuff you may miss out on compared to Elementalist, you're going to more than make up for with the remaining points you invest into the Ascendant after picking up Ele.
If any of the pre-nodes to Mastermind/Beacon were actually decent, you could make a pretty good build with Liege, either Mastermind or Beacon and the pre-node to the other one, skipping the reflect-immunity because all it really does is save you a few chaos by not having to reroll reflect-maps and the leech is too low to be worth using 2 ascendancy points on. But here we are, stuck with Pendulum and Conflux. Yikes.
I was planning on still playing a Detonate Dead Elementalist, but after seeing the HoA rework and what exactly Ascendant gets from Ele, I'd be stupid not to go Ele+Slayer instead.