I think Tim should have his own "these are my monkeys" moment with the LOA
Technically, this is not Tim's problem.
Tim did not send the ninjas to steal some magic artifact that heals anything it touches. Tim neither decided Batman et al had to intervene. And Tim certainly didn't tell Batman and Ra's fucking al Ghul to start some duel.
It is not his problem, until Damian and Jason hit a few ninjas too hard.
"Hey!" Tim yells, feeling still hungover from yesterday's drinks with Tam and silly after a Sex and The City marathon; "Can you guys tone it down?"
"Are you kidding? They are stealing a magic statue, babybird!" Jason argues, shooting at some poor ninja that, thankfully, seems to only get a bruise, the bullet missing by a few inches. "Tell B to fucking wrap it and kick that old man!"
"Grandfather is not easy to defeat," Damian mentions, "His followers will not surrender."
Another ninja gets knocked out by Dick, all while Ra's performs his evil "look at me I am a villain from Bond" laugh at Bruce. Tim, running on five hours of sleep, a donut and diet coke, snaps.
"Enough!" He yells as he dances his way between bullets and hits towards Ra's; in a blink, he pulls the immortal to him, and hisses.
Ra's raises an eyebrow. Intrigued.
"The ninjas are hurt. They need medical attention," Tim complains, perhaps too loudly, but it gets the attention of the bats; "And, to be honest, they are getting their ass kicked. Their moral will be down for weeks, so I'd suggest therapy."
"Now, we agreed to not discuss that here," Ra's murmurs, giving a quick glance to a gasping Bruce, "They will be fine, beloved."
"No. You take them to a doctor now, Ra's," Tim lets him go, crossing his arms, doing the best imitation he can do on his mother, "They are mine too, are they not? I want them to see a doctor and rest."
"... My fault for signing a prenup, I suppose," Ra's sighs and, after putting the statue in the ground, kicks it towards the Batman. "If it pleases you, then I will take them to a doctor."
"That, however, does not mean I will not come back for this artifect. Mother Nature needs it."
"Please, just hire Poison Ivy already," Tim waves his hand in the air, too tired to deal with the bats shocked faces ans gasping mouths, "See you next week?"
"At Paris. Our usual restaurant."
Tim kisses Ra's, quick and a bit silly, and then goes to pick up a wounded Bruce while the ninjas sneak away with their master.
"Gross," Damian whispers.