That Ramirez deal was a clear team-friendly deal. Maybe Devers loves Boston that much, but most players seek the most money.
IMO, offering $160M/6 would not be accepted. The guy is only 25 and will be all season. If the 6 years is an extension, we'd have him for 8 years, but if it's a replacement deal, 6 years brings him to age 30.
I'm not sure why he'd look at age 30 as a better way to make more money. My guess is, he'd want a very long deal with an opt out or two.
Now, the money. If the $160/6 replaces 2 arb years, its close to being enough, as he might make $30M in his last 2 arbs, combined. That leaves $130M/4 for the rest. If you are talking extension after the arb years, then he'd laugh at $160M/6 in a FA year going into an age 27 season.
IMO, if he's feeling "team friendly," he might think this is the minimum he'd take:
$250M/8, and even that might include a mildly front- ended contract with an opt out.