Heart of the well - why the hype?

the gain as extra is way stronger then any damage prefixes you can get on regular sapphires

Im using one for the little bit of instant leech

Some times people just copy paste things that work in other builds. You can for sure confirm if it is good or not importing it on POB.

cant see why you would call it hype, maybe you could explain.

its quite rare, good stats are even rarer, rolling those stats can get expensive.
so if someone posts his version in a group chat i tend to respond with "gz".

if your personal build creation streamer did hype it up, ask him/her and keep in mind that his job is getting you hyped up.

for builds that get not about 70% as extra, 30% dmg as extra is quite the bump.
For builds using monoskill trinity its almost irreplacable.

edit, semantics

Gain as is super valuable because anything that isn't a wand rarely get any. This means that 15% of an element that you are scaling means a 15% damage increase, and you get two, so 30. There's also the factor of herald of ice chaining which uses gain as chaos on heart of the well to break armour.

My build uses gain as phys on my weapon (mostly bc I needed desecrate suffix so gain as was way cheaper than acc phys), and even then, double 15% is still a 18% final damage increase. Around the same as rare jewels worth thousands of divs for like 80 divs.

I totally agree with you. Gain as extra in poe2 is not as good as it seems to be, because it is indeed extra, it doesn’t scale a lot like other mods. But a double gain heart of the well is much cheaper than a perfect 4 mods sapphire or timelost. So using it is not a bad idea. 

Bc the extra damg gained as X is really good, and insta leech allows you to not anoint Fast metabolism and get something more powerful like Cooked.

The gains are in fact way stronger than any mod on a regular sapphire, but most importantly you can have instant leech and mana to life conversion on them, both of which are unavailable anywhere else and with atziri’s splendour and passive tree points you can only ger 98% mana to life conversion, so the 2-3% you can get on the jewel gives you blood magic/lifetap/atalui without pathing or using either of those supports, meaning you can use something like zenith instead, to do 30% more dmg.

Unless you have archmage it's pretty hard to beat the extra damage, even if you do and have extra 200% from it a perfect jewel would mean 10% more damage which is still not bad.

gain as is great, but for CoC the initial reason its picked up is for the instant leech of 15% mod to get out of atziri acuity gloves