Another thing you have to pay attention to is your mana. It is necessary to use powers, and only partially regenerates after use. You have to use potions to get your mana back up to full, so be careful about using mana-intensive powers. Some of them can really drain you, then you are stuck with whatever weapons you have if you get in a bind. Just a side note, weapons are going to be used in your right hand and powers are assigned to your left. Although you can dual wield a gun or crossbow and a sword with no powers assigned.
Missions were a little tricky in this game. It’s not like a lot of those stealth games from yesteryear where you are detected and then you hide and they stop looking for you. If you are detected in this game, the panic spreads through the guards faster than the plague that is ripping through the city. Then they feed off each other, so the alert status of the guards never dies down. Once you are detected, you better start killing or the whole place will know you are there and will be looking for you. I found out the hard way.
Now, the politicians in this game are a lot like the ones in the real world. Always looking for a way to screw someone over. They use the plague as an excuse to take anyone they want away from their home and family and put them in a shallow grave. Or no grave at all. So don’t feel bad about ripping them a new one when the time comes to kill. Although there are options for worse punishments than death in some cases. And they are fun. But I won’t spoil the game for you. You’ll figure those out when you get to them.