Although there are Anima to earn in WoW Shadowlands at all corners and ends, but not particularly much comes together. This is not dramatically bad, because for Anima mainly cosmetic things can be bought and according to the developers there is no reason to have everything immediately - after all, the players have the whole expansion time to unlock everything. That said, the guys and gals at Blizzard have been responsive to the community's demand and have increased the income to Anima significantly in the past.

One of the ways they've done this is through the bonus Anima you get when you've upgraded your Pact Sanctum. Depending on how far you've upgraded the four facilities you'll receive the achievements Out of the Ruins, Drought? What drought? and Sanctum Sanctorum, which increase the anima you earn. For example, you'll get more Anima items when you defeat a raid boss or complete a world quest.

• Since the bonus anima are obviously tied to achievements and not to actual upgraded Pact Sanctum facilities, they won't be lost if you suddenly run out of upgraded Sanctum.

This is the case if you change your pact, as you will then have to upgrade the new sanctum again from scratch. However, you will still get the additional anima.
If you're planning on changing your pact in the near future, you might want to buy some upgrades to your sanctum first (since you won't be able to take the anima in the reservoir with you anyway). This way, you'll start your new pact with an increased anima income.