Questions:
1. Would God require us to pray for all men, and to pray in faith, unless He intends all men should be saved?
God wants all men to come to know Him. But not all will.
The Lord is not slack concerning His promise, as some count slackness, but is longsuffering toward us, not willing that any should perish but that all should come to repentance. - 2 Peter 3:9 http://www.biblegateway.com/passage/?search=2Peter3:9&version=NKJV
“Enter by the narrow gate; for wide is the gate and broad is the way that leads to destruction, and there are many who go in by it.Because narrow is the gate and difficult is the way which leads to life, and there are few who find it. - Matthew 7:13-14 http://www.biblegateway.com/passage/?search=Matthew7:13-14&version=NKJV
2. If you believe endless misery to be the truth of God, why should you desire and pray that it may prove false?
Because the future is not settled, and prayer can affect God.
3. Can the pleasure of the Almighty be contrary to his determinate will?
God's will is that all should come to repentance. It pleases God when someone does, and it pains Him when someone dies rejecting Him.
4. Would the infliction of endless misery afford pleasure to the Deity?
Would forcing someone to live with Him for all eternity be pleasing to God?
5. Can God be glorified by that which gives Him no pleasure?
Is "pleasure" your standard for whether God is God? Why not recognize that the standard is that He is living, loving, personal, relational, and good?
6. As Jesus "tasted death for every man," can it be true that "the pleasure of the Lord shall prosper in his hands," if a part are never saved? (Heb. 2:9)
Jesus died for all. Yet not all will accept his sacrifice.
7. If God "declares the end from the beginning," can the final destiny of mankind be contrary to His will?
Declaring the end point of a race doesn't mean the person who set the finish line knows who will race, let alone win.
Declaring the destination for a plane doesn't mean the scheduler knows who will be on that plane.
8. Can endless misery be brought about contrary to the GOOD PLEASURE of the Almighty?
God cannot be good if, like a sadist and kidnapper, He keeps those who do not want to be with Him in His presence for all eternity.
And if God is not good, then He is not God, because God is good.