I reserve my vote for now due to luffy's durability, but I'm inclining to team monster
Wrath with his appraisal skill would choose who to fight with and collect intel on the adversaries, while knochen stops the other fighter.
For Luffy's Durability, can't Wrath just use Heresy magic or attack, and break his soul? Also induce him with madness, along with using grudge curse to steal some stamina from Luffy when in close combat.
If a Wrath vs Luffy and Knochen vs Pidget breaks out, Luffy would have a hard time injuring and killing Wrath thanks to his Regenerationn and MP&SP recovery skills, along with his high resistance to blunt, piercing and slashing damage, and given that Wrath has supernatural luck and Great Probability Compensation, it would just make it harder for Luffy to defeat him.
When it comes to precognition, if I remember correctly, kumoko with the same precognition was already able to visualize a future image of where the enemy will be positioned in the future like this
So for wrath who has the same skill and many skills such as concentration, thought acceleration and parallel will, he would find it easier to dodge Luffy's attack after all his mind would be splitting different assignments while maintaining a great focus on battle.
Against pidgey, knochen is a flood of 10 to 100 million flying bones, it should be enough to corner pidgey and/or keeping him away from Luffy, and if surrounded, pidgey could be bathed in poison and continuously attacked by demon king's bone fragments. Also even if a bone is fractured into tiny pieces, they are still useable to knochen, for them to become unusable they would need to be vaporized. knochen also have skills such as Physical Resistance so most of the physical damage taken would get nullify on top of knochen already strong defenses
Regarding the poison, Luffy is likely to be unaffected by knochens poison, after all, knochen's poison is a basic skill that has not awakened into a higher skill, though I would say that the skill being at level 10 would mean that knochen's poison would still affect Luffy but rather in a minor way that wouldn't affect Luffy performance at all after all Luffy always had a high Resilience.
But if anyone wants a reference on how potent are poison skills in Death Mage, Van with a non specialiced poision creation skill( Death-Attribute Magic at level 3 ) was able to left a Rank 7 Noble Orc (Taking into account the Vitality) on death's door within seconds of the poison being spread on his face.
Also, is it whitin character for Wrath to share his weapon with is comaraders? if yes then knochen will futher increase in strength and also recieve MP recovery