doctorbadwolf
Heretic of The Seventh Circle
I really like to use a guard drakes that match the dragon in color (and are of a variant that are a true breeding draconic species), with a smattering of ambush drakes, and sometimes a small number of a variant drake that has the ability to jump incredible distances and charge up an elemental bite, which are armored, and ridden by exceptional kobolds who raise and train these beasts.
These drakes can use their climb speed to climb upside down or along walls, and the rider is strapped in to avoid falling out (also have advantage against being moved off their mount). The mounts tend to be moderately armored, some with shields and lances, while others have light spears.
Kobolds are scary on mounts, because it means they have advantage on all melee attacks.
Then there are the ambush drakes with light armored kobold archers riding. I add Skulker to rider and mount, and give them shortbows, training in stealth and acrobatics, and a pounce attack.
I've also used large drakes with dragonborn riders.
These drakes can use their climb speed to climb upside down or along walls, and the rider is strapped in to avoid falling out (also have advantage against being moved off their mount). The mounts tend to be moderately armored, some with shields and lances, while others have light spears.
Kobolds are scary on mounts, because it means they have advantage on all melee attacks.
Then there are the ambush drakes with light armored kobold archers riding. I add Skulker to rider and mount, and give them shortbows, training in stealth and acrobatics, and a pounce attack.
I've also used large drakes with dragonborn riders.
