Master Tactician

more combat effectiveness while staying in the spirit of the Mastermind Subclass

Master of Intrigue

When you choose this archetype at 3rd level, you gain proficiency with the disguise kit, the forgery kit, and one gaming set of your choice. You also learn two languages of your choice.

Additionally, you can unerringly mimic the speech patterns and accent of a creature that you hear speak for at least 1 minute, enabling you to pass yourself off as a native speaker of a particular land, provided that you know the language.

Master of Tactics

Starting at 3rd level, you can use the Help action as a bonus action. Additionally, when you use the Help action to aid an ally in attacking a creature, the target of that attack can be within 30 feet of you, rather than within 5 feet of you, if the target can see or hear you.

Lead From The Front

Starting at 9th level, you have learned to help your allies while fighting along-side them.

When you hit with an attack, Help is applied to the next attack on that target.

Got You Covered

Starting at level 13, You have learned how to better keep your allies out of harm's way.

You can distract enemies, allowing your allies to escape. When an ally would trigger an AoO, you can use your Reaction to allow them to use disengage as a free action. 

Alternatively, whenever a creature within 60ft of you attacks an ally, you can use your reaction to impose disadvantage on that attack.

Soul of Deceit

Starting at 17th level, your thoughts can’t be read by telepathy or other means, unless you allow it. You can present false thoughts by succeeding on a Charisma (Deception) check contested by the mind reader’s Wisdom (Insight) check.

Additionally, no matter what you say, magic that would determine if you are telling the truth indicates you are being truthful if you so choose, and you can’t be compelled to tell the truth by magic.