Having ventured into the lands of gothic horror for a soon upcoming adventure, I wanted to create something a little more out there from the normal rules of D&D 5e. So I came up with this idea that the party would meet a Hunter of sorts; one who hunts monsters with brutality and efficiency (and who ends up going insane). So I created this template and I hope to get the answer to the question...
What would be the proper CR for a monster with these abilities?
Because of the specific ability this creature has, I have some doubts about the normal method of CR calculation which is why I am bringing it to you all.
I use a CR calculator; plugging in the information, I got a CR of 5. This creature has a Defensive CR of 4 and an Offensive CR of 6. Of other note, it lists CR based off HP as 2 and AC for Health CR as 13. The Max CR for its AC is 12. Additionally CR based off Damage, Attack Modifier for Damage, and Save DC all are 6 while the Attack Modifier Min/Max CR is 8/10. If any of that helps.
Medium humanoid (human), any alignment
Armor Class: 17 (breastplate)
Hit Points: 90 (12d8 + 36)
Speed: 30 ft.
STR - 16 (+3)
DEX - 16 (+3)
CON - 16 (+3)
INT - 11 (+0)
WIS - 15 (+2)
CHA - 14 (+2)
Saving Throws: Dex +7, Wis +6
Skills: Deception +6, Insight +6, Intimidation+6, Perception +6, Stealth +7
Damage Resistances: poison
Condition Immunities: -
Senses: Passive Perception 17
Languages: Common, Dwarf
Close-Quarters Expert. Being within 5 feet of a hostile creature doesn't impose disadvantage on the vastoyan hunter's ranged attack rolls.
Quick Silvered Weapons. The vastoyan hunter's pistol attack and hunter's blade attack are considered magical for purposes of ignoring resistance.
Multiattack. The vastoyan hunter makes 3 melee attacks.
Hunter's Blade. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (2d4+3) slashing damage.
Shoving Kick. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: If this attack succeeds, the target must succeed on a DC 16 Strength saving throw or be either pushed 5 feet away or knocked prone (the hunter chooses which).
Pistol. Ranged Weapon Attack: +7 to hit, range 30/90 ft., one target. Hit: 9 (1d10+3) piercing damage.
Parry and Riposte. The vastoyan hunter makes a pistol attack against a creature that is attacking them with a melee attack. If this pistol attack succeeds, the creature's attack ends and the vastoyan hunter may make an immediate melee attack against the attacker with advantage. If this melee attack succeeds, it is a critical hit.