Has any being, whether spirit or human, ever strengthened Almighty God, and has He ever been attended by humans with food and drink?

The Almighty God does not need to be strengthened. There is no need for physical things like food and drink in heaven.

Acts 17:24, 25

The God who made the world and all the things in it, being, as he is, Lord of heaven and earth, does not dwell in handmade temples; nor is he served by human hands as if he needed anything, because he himself gives to all people life and breath and all things.

NO. God is not dependent on humans. Idolaters were accustomed to clothing their images with lavish garments, showering them with expensive gifts, or bringing them food and drink​—as if the idols needed such things! However, some of the Greek philosophers in Paul’s audience may have believed that a god would need nothing from humans. If so, they no doubt agreed with Paul’s statement that God is not “attended to by human hands as if he needed anything.”

Indeed, there is nothing material that humans can give to the Creator! Rather, he gives humans what they need​—“life and breath and all things,” including the sun, the rain, and fruitful soil. (Acts 17:25; Gen. 2:7) So God, the Giver, is not dependent on humans, the receivers.

GOD is constantly 'attended to' by both humans and angels. However, they do not 'strengthen' GOD by their own distinct means or mechanisms. They represent GOD maintaining His own strength. Each of His 'elohim,' (also called 'angels'), reflect aspects of His sacred Names, (attributes, wisdom and powers), but only GOD Himself expresses all of those Names simultaneously.

Does GOD 'eat and drink' or take on bodies?

Yes, absolutely.

New Testament scripture clearly explains and illustrates the differences between the indestructible 'Original' body after which the current corruptible human 'copy' was modeled. For example, 1 Corinthians 15:42-49 compares and contrasts the attributes of the 'psuchikos soma,' (Biblical Greek: 'soul-based body,' usually translated 'natural body'), with the 'pneumatikos soma,' (Biblical Greek: 'spirit-based body,' usually translated 'spiritual body'). Jesus Himself demonstrated its attributes, clarifying for His disciples that His ability to travel great distances in an instant, vanish from their sight and pass through material objects did not diminish His capacity to be physically handled or keep Him from being able to eat and drink, (all of which He went out of His way to display using the 'spirit-based body, Luke 24, etc...). This is the same type of body into which each of us will be resurrected. If 'spirit' was truly incorporeal, what would be the purpose of a 'resurrection?'

“Truly I say to you, I will never again drink of the fruit of the vine until that day when I drink it new in the kingdom of God.” (Mark 14:25).

No gods exist.

No, never. God is omnipotent, omnipresent, omniscient, and He has always existed. No man may see God's face and live. When God passed by Moses He had to hide His face fro Moses because God is a consuming fire, and if wwe were to be in His actual presence without Christ's righteousness, we would immediately be burned up,

Daniel saw just an angel of God and he was so ill, he had to go to bed for a week.

The human body full of sin, cannot cope with God's presence. Jesus who is also God is too powerful, Almighty and glorious for our human body to be able to stand His presence. His glory actually blinded the apostle Paul once and he had to have huge scales removed from his eyes by Jesus.

That's why the Bible says, "no flesh and blood can inherit the kingdom of God." (1 Corinthians 15:50. Our body when we die has to go into the grave. It's only our spirit which leaves our body and returns to God who gave it. (Ecclesiastes 12:7).

In the resurrection of the dead bodies, the grave will lose its' victims and the bodies of Christians will have to be changed to be immortal and incorruptible in order to go to heaven.

Spirits and gods exist only in stories.