The hovering manticore flies down to the melee, positioning himself in such a way as to get cover from you and the Rogue (interposing the cleric and bard in between) and attacks the Cleric.
He rolls a 22, 9, and a 22, hitting with a bite and a claw for a total of 19 damage.
His buddy hasnt had his reaction reset yet, so he cant make an attack using Horned ones call.
It's now the other Manticores turn. He attacks the Bard, for results of 21, 8 and 20, also hitting with two attacks for 15 more damage.
The 1st manticore then uses his reaction to attack the Cleric again with a bite, getting a total result of 19 (a miss).
Damn this party has high ACs!
The
Fighter advances 15' towards the melee (difficult terrain) and tosses a (non magical) javelin at the Manticore, rolling a 13 and missing. He then uses a bonus action, forgoes a weapon attack and expends a superiority dice to allow the Rogue a shot at the manticres as a reaction with Commanders strike.
The Rogue misses with a result of 14!
Next is the
Rogue. He uses his bonus action to take Aim, and shoots with advantage at the Manticore that lacks cover, rolling a 23 total, and hitting, dealing 28 points of damage.
Manticore 1: 80 damage
Manticore 2: 68 damage.
Bard: 41 damage.
Cleric: 19 damage.
@Stalker0 - it's your turn. What do you do?