@Flash_asd You can still do all that, you would just need to a bit more energy storage (59k in storage would be 11 storages, which cost only 2750 mass total to make, that's very small compared to the cost of a ML) and enough power generation to run them, or extra storages (if you want to save up a second shot you would want to spend about 5k mass to get 20 storages).
If you want to continuously fire massive overcharges every 4 seconds, you need 60k power every 4 seconds, which is 15k power/second, which is 6 T3 pgens. But in practice, nobody is going to be needing to dish out that many full-power OCs. With just 2 T3 pgens, you'd get 5k power/second, which is enough to fill up 120k of energy storage every 24 seconds. Every 24 seconds you could fire off two full-power OCs (30k total damage to a monkeylord, which if it's got some other damage, should be enough to kill it). Every 24 seconds, you could fire 4 half-power OCs, 30k power for 7500 damage, which is the max HP of a no-vet brick.
@psions A no-vet harbinger can only have 4600 HP, which would mean 18,400 energy storage, which you can get with just 3 e storages (5k each plus the 4k that your ACU has). So it would cost 750 mass to get the ability to one-shot a harb. If you want to shoot off 18,400 every 4 seconds, the max rate of fire for manual overcharge, that's only 4600 energy/second that you need, which you can supply with just 2 T3 pgens.
CORRECTION: you need 4 e storages, you need 20,445 e in storage to one-shot a full-health full-shields no-vet harbinger. This is because when you have 20,445 e in storage, your overcharge will use 18400 energy and leave 2,045 in the bank. Overcharge will only use 90% of your energy bar (unless 90% would be less than 5k, in which case the overcharge will use 5k, because overcharge can never be smaller than 5k)
also, in practice if you take a harb down to about 300 health, it doesn't take much for your ACU or something else to kill it with regular shots, so maybe it's fair to say 3 storages are enough to stop a harb even though technically you would need 4 storages for a guaranteed one-shot
So it costs 750 mass to get enough e storage to kill the first harb that is rushed out at you. (Which is less than the total cost of a harb, 840 mass.) And if you want enough in storage to kill two harbs, you need 4 more e storages, another 1k mass. For 1750 mass, you can have enough e storage to kill 2 harbs (combined cost, 1680 mass). Overcharge is still very cheap compared to the cost of making harbingers. And that doesn't take into account that you can refill your power bar at no mass cost, and if you smash harbingers, you will get significant reclaim.
If you scale up your e storage and e production over time, the cost won't even seem like very much.
But there's really no point in arguing about it. The change isn't going to be reverted any time soon. The game will normalize around the new balance. We can check back in 2-3 weeks to see if players are making it work or if they still hate it.