I would choose;
Vital Force:I would combinate this with my combos and i would get more damage.I think damage is the second most important thing in this game.
Vampire Will:My second choice.I would combinate this with my regain health combos(thirst for blood etc).It would be a nice ability to comeback in a fight which you are losing.
Healing Wave:I dont use in fights especially healing scrolls.It works like healing scroll and it would be nice that getting heal without using a combat slot
Fit of Energy:I would choose this.Its same with Vital Force except 1 thing.It strenghtens magical damage too.You know when you get a red pet you would probably be 11+
Lethargy:I would choose this cuz most of the players use strenghtening potions(blood,vampire etc) and especially the bonecrushers.I would use this spell against bonecrushers.
Reflect Damage:Usefull in the beginning of the fight.You can reflect a little damage but its still usefull.
Shallow:I would choose this cuz at the high levels characters have a lot of health.And it damages by % of enemys life and its very usefull.
Curse of Harm:Usefull against bonecrushers and dodgers.They do alot of damage especially the bonecrushers.Most of the damage will be paid by their health.Thats why its usefull and i think the most usefull spell after healing wave.
I wouldnt choose or I wouldnt use often:
Wild Daring:It strenghtenes your attack but it will cost your health.I said attack is the second most important think but health is the most important think.You shouldnt waste your health for more damage.Attacks can be dodged,absorbed but health is not