Preface: Missing Beginners MA, Befall, Rowland Set old price, DXY B old price, Shigure (M) old price. Please provide screenshots!

Along with the 2.9 update comes a material overhaul! Two new materials called Mithril and Asterite will streamline the old OW materials. This post will contain all possible sources for them.

First up: Material Refining

Material Refining is a new way to sell selected materials, salvaging them into Mithril and Asterite instead of Coins. Along with Material Refining comes Energy, which refills with Duty (1.55 * 0.5 * Player Level per Duty). When refining with Energy, Asterite gains double! As for their respective shops, the cost of buying a single mat is x4 of their normal selling price.

Shop:

*OW Material is Magatama/Core for their respective regions. Core is for LK and AK, Magatama is for Sü, IR, Miko.

Next, the main agenda: Open World

On the 2.9 update, your old materials will receive a Recycle motif. You can manually exchange for them at the LTO Exchange Shop, or wait for the next update which will convert em automatically.

Next: OW Shop

The OW shop is going away in 3.0, but it's still available in 2.9 (you can double exchange FS basically. don't trade away the mats for FS). The Stigmata and weapons available will change materials and will be available at the Foundry.

Next up on the list: OW Collection

With the new things coming Mihoyo has been kind enough to provide an average droptable.

Higomaru pickup will change from 200 Silver Coins to 480 Mithril and 60 Asterite. The next few following tables are self-explanatory.

Next up: Dailies!

150 Duty gives you 1200 Mithril.

It's technically a weekly, but let's start with MA first. Soulium Ore rewards have been replaced with Asterite.

Next up: Will Dailies

Added Mithril to per clear rewards.

Last part: Calculations!

Weekly, you'll have to buy the Augmentation Cores which total to 3600 per week. Afterwards it's generally recommended to buy FS frags for SS. However, it amps up your expenditure by 900 per day, or 6300 per week, making you spend 9,900 Asterite per week.

Assuming you farm for maximum Asterite for a week:

Picking Schicksal HQ gives you 3050 by collection, and another 1340 from SSS 10 Defense, gives you 4390 Asterite. With Masters MA you'll get an additional 1680 Asterite for 6070 Asterite. 630 from S rank OW rating. Lastly, Higo gives us 60 per 23 hours, which is a 60 daily, resulting in 7120 Asterite. Clearly, it's not enough to afford your expenditure. This is where energy comes into play. The most recommended material to refine are the Twin Wills, as you get 2 per clear which gives you 1000 Asterite a day (500 unboosted, but why would you??), which is enough to cover the costs. Obviously since Twin Wills are used as upgrade materials refine them sparingly; if you don't have a good weapon for example go ham on refining Twin Ocean Wills. Now, you'll ask... is 50 energy worth 1,000 Asterite a day? I would argue yes, since that 50 energy can get you 3 fragments, but generally only FS is worth buying for.

Edit:

As mentioned below there's 210 purchasable Ancient Willpower for 42k Mithril and 15,750 Asterite. This is equivalent to 15 S rank fragments, 23 for awakened S rank souls. Now, here's the thing... 15,750 Asterite is a lot. Let's assume you already have SS FS and you're not saving up for future Augmentation fragment sales (300 Asterite for 1 frag). With 7120 base Asterite, you'll spend 3600 a week leaving you with 3520 Asterite per week. That's 14,080 Asterite leftovers per 28 days. You'll need 1670 Asterite somewhere to finish the 210 maximum, or stay with 186 Ancient Willpower.

Second note, as mentioned earlier you'll need 42k Mithril. Shicksal gives ~500 more Asterite and 8 Willpower per week in exchange for roughly 5k Mithril. However, since 150 Duty gives you 1200 Mithril and Higo gives you 480, you'll still roughly hit the quota.

2nd Edit: I'm an idiot that forgot to add weekly ratings OW rewards. Other edits have been reflected for this oversight.

That's it folks. If I forgot anything please mention it.