Ple-Sen
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By the way, what do you think about giving Anders a hidden attack and trying to use him as a scout in the sewers, moving around in stealth?
1) What if they set up an ambush at the entrance? Anders crawls into the sewers, and no one comes out. There is such a risk.
2) There may be doors in the sewers that need to be opened. We need to know if Revant will answer whether such an action takes you out of stealth. If it does, and there are enough doors, then the successful execution of the scout role seems doubtful to me.
3) If you put Isabella's cloak on him and learn the sneak attack, Anders will have 20 stealth. If the enemies have at least 10 perception (considering the battle in Tamfana, this is quite possible), then this will be a 25% chance of being detected by a single enemy. And the more of them there are, the higher the chances of detection will be. And the final result may be the same as in the first point.
If Revant answers that opening doors does not take you out of stealth, then you can try it, but don't forget about the risks – Anders has a good chance of getting killed.
Does she need anything?
Oh yes, I strongly recommend not putting things in other people's chests, as the contents of the chests are only displayed to the owner (I checked with Revant). If you decide to hide something with Alessia, you may lose it forever. And at least buy a few potions, even if you're aiming for the "Cupid" build.