I lean toward Farah going with the leaders, at least through the half, even if it goes out at WR pace. Hanging back and time trialing a 2:06/2:07 is incompatible with Farah's disposition as a competitor and I remember he expressed regret at using that approach in 2014. Also, Farah is 35 and likely only has a few more shots at being competitive at the elite level.
But after reading this article, I'm not sure. If Farah were truly expecting to compete for the win, I don't think he would talk like this:
“The aim is definitely go after that British record for sure. But at the same time, you know, in my mind, since 2014 to now, I’ve learned a lot more and done a lot more. So see how it goes I guess, but I guess the aim is just one step at a time, go out set a British record, see what I can do and then see what happens.”
Not exactly brimming with confidence...