/5eg/ Fifth Edition General:

How do people on the DM's guild get their monster stat blocks to look right?

Allosaurus
Axe Beak
Brown Bear
Camel
Constrictor Snake
Crocodile
Dire Wolf
Draft Horse
Elk
Giant Bat
Giant Boar
Giant Eagle
Giant Goat
Giant Hyena
Giant Octopus
Giant Owl
Giant Sea Horse
Giant Spider
Giant Toad
Giant Vulture
Hunter Shark
Lion
Plesiosaurus
Polar Bear
Rhinoceros
Riding Horse
Saber-Toothed Tiger
Tiger
Warhorse

And some stuff in Volo. Look that up yourself, you lazy bum.

You could do mastermind rogue stuff without actually using your bonus action via a familiar.... Fluff it as... I don't know... manifestion of your power or something..

Rate my homebrew ranger:

Mage Hunter
3- whenever a hostile creature within 30 feet of you casts a spell you can use your reaction to make a weapon attack against that creature if it is within reach of your weapon. You can cast Detect Magic and Identify as rituals with no material components. Also, the advantages granted by your Favored Enemy feature extend to include any creature capable of casting spells.

7- When you damage a creature that is concentrating on a spell, that creature has disadvantage on the saving throw it makes to maintain its concentration. You also have advantage on saving throws against spells cast by creatures within 30 feet of you

11- you add Counterspell to your list of known spells. You may cast it without expending a spell slot once per short rest (wording will change)

15- whenever you cause a creature to lose concentration on a spell or successfully cast Counterspell the affected creature takes psychic damage equal to 1d10 plus your wisdom modifier

Here's a thought, how about
"You may use your breath weapon an additional number of times per day equal to your constitution modifier, you may only use this feature while raging"

Dragon's Roar: Too strong. Berzerker Path requires gaining a stack of exhaustion after a frenzy rage just to make a bonus action attack. A bonus action breath weapon with +1d6, extra DC on a core barb stat, and recharge more often than 1/rest. You can easily get of 4-5 of them in an average day.

Surging Soul: So unless two-weapon fighting, the only thing this archetype has to consume it's bonus action is breath weapon. So you basically breathe flame and slash, round2 rage and slash, round3 breathe and slash, round 4 check for extra breath. So you can probably get like 6-7 breath attacks (which scale with level and are only limited by the action economy, which is no longer an issue).

Draconic Senses: This shouldn't cause too many issues. If it turns out blindsight is good for more than overcoming blinds/killing invisible enemies, perhaps limit just the blindsight portion to 1/rest. IMO it's fine.

Legendary Might: I like the that this is thematic with legendary resistance, but I feel it overlaps with fighter a bit. I'm also done commenting on breath weapon power.

Frightful Aura: So it's a better Intimidating Presence?

Will provide proposed balance changes shortly

100% agree with this assessment

Should I go Lore bard or Divination wizard for a detective? Both seem to fit...

Or how about a free use of breath weapon when entering a rage? That way it stays level-appropriate

Inquisitive or mastermind rogue