[New Class] The Tactician, aka the mundane caster

[yisopo]

Changelog 2:
What do you think? Is Flowing Strike feature too strong? I copied from the Eldritch Knight but here is much stronger because the way the Tactician works.

Changelog 3:

• Flowing Strike: changed name in "Flowing Soul", and changed the description in "Your Gambit save DC increases by 1".
• Fire Savant/Water Savant: "You can use this feature a number of times equal to your proficiency bonus" instead of "twice per short rest"