Eleanor's Poleblade as a two-hand weapon was one of my favorite playthroughs. Keep the Dragon Communion seal in your back pocket and start out with a Rotten Breath and finish up with the Eleanor's Weapon Art. One of the more fun combat methods I found in the entire game.

But the Dark Moon Greatsword when charged up is too fun for me. It is one of the most looked down upon weapons in the game for PVP but its truly awesome to try and kill elite invaders with this set up bc I know it just kills them to lose to a DMGS Mage.