First of all to Larian: Really created a 10/10 game!
Nevertheless one thing that bothers me a bit is the low difficulty in tactician Mode.
After level 5 you have no problem whatsoever. There's really no challange to the fights except maybe 1 fight in act 3 (if you want a certain person to stay alive during the fight).
You dont really need to look up enemy weaknesses or makr use of terrain/highground.
So either give Enemys more & Stronger Spells to use, or scale the hp. Or both.