The phrase "an obsessive level" is correct and usable in written English.
It can be used to describe a degree of obsession that is particularly intense or extreme.
Example: "Her attention to detail reached an obsessive level, making it difficult for her to complete projects on time."
Alternatives: "an extreme degree" or "a compulsive extent".
She focuses on an obsessive level.
Panettone has its roots as a regional specialty in Milan, a luxury bread made for the holidays with an obsessive level of attention to technique and ingredients.
There is an obsessive level of detail, such as the inlaid wood carvings on an upended desk in a pulverized building.
It's an obsessive level of detail only the most devoted cat lover would need.
In a handful of years, having just a few social relationships to count on (mostly consisting of a single friend called Sara), my affair with books reached an obsessive level of magnificence, from Louisa May Alcott to Jane Austen and George Orwell.
As an organization, ISIS has become the wealthiest militant group in the world with assets in the low $ billions and has developed an almost obsessive level of bureaucracy, account keeping, and centrally controlled but locally implemented military-political coordination.
A similarly obsessive level of detail went into the car models.
As a result, what had been a sort of macabre hobby of mine, indulging in the odd bout of health anxiety, graduated to a near obsessive level and, like my dad, I was pretty much focused on one thing.
Our crush on comedian Cameron Esposito was already at a dangerously obsessive level (hot + funny = swoon) but after seeing her new Buzzfeed video, "Ask A Lesbian," we're not sure how we're going to concentrate on anything for the rest of the week (month? year?) other than how perfect she is.
On Fordham Road, a few blocks north of the Mount Eden section of the Bronx, Mr. Flores, 52, seems to have taken the role of unofficial neighborhood "mayor" to a different and perhaps obsessive level.
The obsessive level of detail in every location just will not translate to current machines.
