"I was shown that Satan's power is especially exercised upon the people of God. Many were presented before me in a doubting, despairing condition. The infirmities of the body affect the mind. A cunning and powerful enemy attends our steps and employs his strength and skill in trying to turn us out of the right way. And it is too often the case that the people of God are not on their watch, therefore are ignorant of his devices. He works by means which will best conceal himself from view, and he often gains his object. 1T 304.2"
"Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:"
Both passages warn about Satan's activity and the need for vigilance. While the imagery differs (roaring lion vs. concealed devices), the core message is similar.
"Lest Satan should get an advantage of us: for we are not ignorant of his devices."
EGW references the idea of being ignorant of Satan's devices, which is directly stated in 2 Corinthians 2:11.
"Put on the whole armour of God, that ye may be able to stand against the wiles of the devil."
The EGW passage directly addresses Satan's power and devices, echoing the warning in Ephesians 6:11 to be aware of and stand against the wiles of the devil.