Capt'n Twitch

Magic Resistance.  has advantage on saving throws against spells and other magical effects.

Grit: gain a number of grit points equal to your Wisdom modifier (minimum of 1). You regain 1 expended grit point each time you roll a 20 on the d20 roll for an attack with a firearm, or deal a killing blow with a firearm to a creature of significant threat (DM’s discretion). You regain all expended grit points after a short or long rest.

Trick Shot save DC = 12 + your proficiency bonus + your Dexterity modifier

Sharpshooter:

• Attacking at long range doesn't impose disadvantage on your ranged weapon attack rolls.
• Your ranged weapon attacks ignore half cover and three-quarters cover.
• Before you make an attack with a ranged weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.

Spellcasting.  is an 18th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 17, +9 to hit with spell attacks). The archmage can cast disguise self and invisibility at will and has the following wizard spells prepared:

Cantrips (at will): fire bolt, light, mage hand, prestidigitation, shocking grasp

1st level (4 slots): detect magic, identify, mage armor, magic missile, feather fall

2nd level (3 slots): detect thoughts, mirror image, misty step, blur

3rd level (3 slots): counterspell, lightning bolt

4th level (3 slots): banishment, fire shield, dimension door

5th level (3 slots): telekinesis, scrying, wall of force

6th level (1 slot): globe of invulnerability

7th level (1 slot): teleport

8th level (1 slot): mind blank

9th level (1 slot): time stop

2 actions, 2 Attacks per action 

Ruby (revolver): +8 to hit, 2d8 +4 Piercing + 1d6 magical/ elemental damage type of choice (can have two of these weapons if one so pleases)

Sapphire (+2 Veterans cane/Longsword): +10 to hit, 1d8 + 6 slashing

Dagger Armblade: +8 to hit, 1d6 + 4 +1d6 poiso.

Bonus actions: cunning action, fast hands, lightning reload, rapid repair, quickdraw 

Uncanny Dodge: when an attacker that you can see hits you with an attack, you can use your reaction to halve the attackers damage against you