The hatching strategy
The best egg hatching strategy depends on what stage you are in the development of your collection. I’ve categorised these below and you can decide which is most relevant to you and when to progress from one strategy onto the next. I’ve written them following on from the previous stage so be sure to read through them all.
In a nutshell:
You have a short list of mythics you want to get then hatch only on eggs they’re featured, where you also don’t own the featured legendaries. In the later stages, once you’ve got a good collection, you progressively shift focus onto awakening mythics and worry less about the quality / how many of the featured legendaries you have already.
Early stage
This is where you have a fresh account. The focus is getting a collection of high quality monsters to complete content and form a foundation for a strong collection in the long run.
Create a list of roughly 10 mythics that are strong when awakened and also good in second form and that you like the look of (see the tier list section for second form mythics). Wait until they’re featured, when you own none of the featured legendaries and there’s at least one top legendary in there (some kind of S tier). Stop hatching as soon as you hatch a copy of the mythic, or if you get the strong legendary in the first few packs (so you’re still super far off the mythic pity). If you got the mythic, take it off your list and consider adding another mythic to the list.
If you find there are many egg banners which meet the criteria above, consider either making your list of mythics shorter or waiting for egg banners which have 2+ high tier legendaries featured.
Middle stage
This is where you’ve got enough good monsters you can complete most PvE events and you want to start aiming for the late game. This shifts focus onto building collection size and awakening mythics.
Create a list of mythics you would like to awaken that is 5-10 in number. Hatch only on eggs which feature those and where you also own none of the featured legendaries. Compared to the early stage, do not care as much about there being a high tier legendary. Stop hatching when you get a copy of the mythic and in the meantime got at least one of the legendaries. If you get the legendaries in the first few packs (so you’re still super far off the mythic pity) then consider stopping to wait for a better opportunity.
Bear in mind that mythic pity is 30 packs (1200 gems), so try to maintain a large gems hoard (2000 gems?) so you’re prepared to go to pity if necessary.
Later stage
This is where you own many legendaries so too few eggs come under middle stage conditions and your gems build up if you stay too strict.
The plan is much like the middle stage. Continue with a list of 5-10 mythics to awaken. However, now you can hatch even when you own one of the featured legendaries. Just make sure there are new legendaries being featured that you’d like to own. Also, another difference is you should make sure you are always prepared to go to pity and you don’t stop if you get the featured legendaries early. You stop when you hatch the mythic and the egg doesn’t still fill the criteria for hatching or your gems are too low.
Spender / Ultra late stage
This is where you’ve got practically all legendaries you care about or are happy to spend for mythics.
Create a list of the mythics you want to awaken that is maybe 5-10 mythics long. Hatch only when they are featured and when there is at least one featured legendaries you don’t own. Once you have all the featured legendaries then stop hatching on the next hatch of the mythic. Bear in mind this is only a recommendation for efficiency. You can obviously just go all out until you awaken the mythic if you wish.
If you’re a spender who plans to do this I recommend making your list slightly smaller; more like 3-5 mythics at any one time. This will probably help you spread out your spending, making the most of shop offers and avoid hatching ones you regret spending on. It will give you time to really get the most out of the mythics you awaken and learn to use them well.
If you’re not a spender then I recommend you keep a hoard of a few thousand gems (e.g. 4000) and only hatch when you’re above that, to space out your hatching a little and mean you have enough to fully awaken a mythic when you want to.