Cat School Witcher

Assassinate. During its first turn, the assassin has advantage on attack rolls against any creature that hasn't taken a turn. Any hit the assassin scores against a surprised creature is a critical hit.

Sneak Attack. Once per turn, the assassin deals an extra 14 (4d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the assassin that isn't incapacitated and the assassin doesn't have disadvantage on the attack roll.

Signs. The Witcher only has enough stamina to cast 4 signs each combat encounter. 

Quen. The Witcher casts Quen on itself, adding +5 to AC until next turn. 

Yrden. The Witcher casts Quen around itself, adding +2 to AC until next turn, or until forced out of the circle. Any enemy that enters the circle suffers a -5 to each roll to hit. 

Multiattack. The assassin makes two shortsword attacks.

Shortsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

Light Crossbow. Ranged Weapon Attack: +6 to hit, range 80/320 ft., one target. Hit: 7 (1d8 + 3) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

Igni. Ranged Spell Attack: +6 to hit, reach 10 ft., any target in range. Hit: 8 (2d4+5) fire damage, spreading from target to target within range. 

Aard. Ranged Spell Attack: +6 to hit, range 30ft, any target in range. Hit: 8 (2d4+2) physical damage, and launches any target 10ft backwards.