I’ve never run the Rat, and while that doesn’t make me special or better than those who do, it suits my play style so I prefer it. I’m at about 5100 trophies, sometimes a few more, but always above 5000.
As others have said, I have 8 strong dinos rather than 7+Rat, and this gives many more options.
I’ve always used Monosteg, and since it gained the swap in ability, I find it even more useful to counter the Rat. A bit dirty, but trophies are trophies…
So yeah, try it. Balance speed and armour and you’ll survive just fine