Which of MK's clones does he trust the least and trust the most with his kids?
The answer might surprise you (owo)
But the least reliable, according to the most popular MK clones, would be the Delivery Boy and the Artist, and the most reliable would be Porty, despite what one might think.
Delivery Boy, although his exterior is big and somewhat slow, there is a slight threat that he might eat the children, both unconsciously and not. MK doesn't usually take him out to take care of the children, but when he does, he makes sure to finish whatever he is doing to return home quickly. It's not going to happen that Delivery Boy swallows any of the children with rice... although he has never shown any sign of wanting to do that.
As for the Artist, he can take care of the children decently, but if MK leaves him with them all day, when he returns, he will find the whole house painted and will have to deal with the occasional argument with the children about why they should erase "their works of art" from the walls. This improves as they get older, but the influence of the Artist to explore his art is too much temptation for the youngest, especially when it comes to Mao and little BaoBao.
Meanwhile, Porty, who is the craziest and has a history of involving a bunch of clones to go against MK in the past, is the one who is closest to the children and with whom his "father side" awakens (something he will never admit). Porty has a certain resentment towards them, but like MK, he can't help but love and care for them, although, of course... in his own way.
The only rule that Porty has is that as long as he doesn't take them out to a discotheque, he is free to have "mini-parties" at home while MK is not there, although later he has the obligation to order everything with or without the help of the children. This depends on how late it is for them.
I would say that with those three MK he manages most of the time, although these did not become relevant until after the break with the mother. During that time, MK created a clone that took over the task of caring for the children in his absence. And that turned out… as well as you could imagine XD
The children baptized this clone as “Pops” due to the event that unmasked him as one of the MK clones. This fulfilled perfectly the role of replacing MK by taking care of the children without their noticing, taking care of them like a loving father who only has his children in his heart; he was too perfect to last.
The problem didn't come from a rebellion against MK (like Porty did), but rather the kids, who were getting used to MK's powers during this time, somehow ended up blowing it up by accidentally dropping a bookcase on it. This caused them to panic, believing they had killed their own father, and call Mei, who, to her credit, didn't know whether to laugh or cry.
After that event, MK had to make a list of his abilities and give a long talk about them to the children so that no other such incident would happen again.
As for Pops, MK continued to invoke him regularly to take care of the children, only now they know that he is a clone.
I expatiated, but hey, that's my answer haha XD