Does adding multiple skills when combining creatures cause balance issues?

I’m creating a Svirfneblin Evil Mage by combining the stat blocks for each Evil Mage and Svirfneblin.

A Svirfneblin has the skills Investigation +3, Perception +2, Stealth +4. An Evil Mage has the skills Arcana +5, History +5 and saving throw proficiencies INT +5, WIS +3.

Does having 5 skills and 2 saving throw proficiencies cause major balance issues?