I think of these in my head all the time. These are fun because it take 30 minutes to calculate and 'make' an extremely good build, compared to the years it would take actually playing the game. I am only doing this because I can't log onto Nod so I am really bored.
So, here is my first theoretical build, a Paladin/Magician with 100 1H LG Crush, 99 1H Epic Crush, Demonskull Helm, Zirconethyst Sleeves and Legs, and Aliangel BP. I was stupid and kind of forgot to do bowsets on this one. Just add some more Str enchants and crit chance and it's the same thing.
The point of this build is to maximize attack speed, while increasing the entire group's DPS with the Vile Tomahammer and using group auras to support the group, such as Flamecall (massive bonus to this, allows group's caster to have an extra space), Resist auras, and also melee auras to increase speed and gain mana/energy.
With R5 Sharp, Vile Tomahammer, and R6 quicksteel rune, delay for DW 100 lg crush and 99 epic crush is approx 16.25, which is really nice.
