If you want to describe someone as being highly skilled or competent, you can use phrases such as "highly proficient," "expert," "master," or "adept." Here are a few examples:

"She is highly proficient in Spanish, having studied the language for many years."
"He is an expert in computer programming, with years of experience in the field."
"She is a master of diplomacy, able to navigate difficult situations with ease."
"He is an adept musician, able to play a variety of instruments with ease."

You can also use these phrases to describe someone's abipty in a specific subject or activity, such as "She is a master chef" or "He is an expert in ancient history."