Behold, the Mastermind!

Titan Quest Lab presents the first featured build: the Mastermind.

Class: Spellbreaker (Warfare + Spirit)

Basic gameplay: You summon a lich king, the outsider and ancestral warriors. With 100% recharge you can keep them up indefinitely. Coincidentally, some of that recharge gear also has -energy cost, and with the Battle Standard you can reach -100% in that as well, allowing you to spam any skill you want for free (not to mention the other delicious bonuses like the +1 to skills, boost to your summons' damage and weakening enemies). If 7 summons aren't enough, you can also use Enslave Spirit to gain a huge Diablo 2 style army. Is that all though? Not quite. I didn't use it in the video, but spamming War Horn (with Doomhorn maxed, I would hope) will keep all enemies in a huge radius around you perpetually stunned, and because of the -% to life it wrecks through mobs of non-undead enemies like nothing else. Their health bar can be reduced to almost zero before your summons take the first swing!

Here's a video of him in action (it's pretty old, but you get the idea):



The skill distribution can be found on TitanCalc.com

Equipment (keep in mind that values may vary. For example, the Archmage's Clasp has, on average, about -40% recharge but I've found some with as much as -47%):
I'm only posting what I consider "end game" gear. If you'd rather use something else, go ahead, as long as you have -100% energy cost and recharge.

Head: Hesione's Golden Veil.
Wrists: Archmage's Clasp
Body: Take your pick (I use Calypso's for the +2 to skills)
Legs: Go wild. I like Demonskin Walkers for the +1 to skills (not to mention the mouthwatering resistances)
Shield: Zeno's Third Paradox. Hands down the best defensive item in the game.
Weapon: Lykaion Malleus. -recharge, -energy cost.
Amulet: Polaris. Same reason as Lykaion Malleus
Rings: -energy% cost rings. Off the top of my head, Eye of Horus, Persephone's ring, Cartouche Ring and Seal of the High Priest have about -10% each.
Artifact: Thoth's Glory for the +1 to skills. The Req reduction also helps get all your gear on considering you're spreading points across all 3 attributes.

Speaking of attributes, you only need them to meet requirements. Any perk they offer is nice but unnecessary. Attributes don't help summons and no attribute affects the vitality damage War Horn does. Once you've figured out what you're gonna wear, dump all extra attribute points into health (trust me, you'll need it because despite your large army, every monster's still gonna want a piece of you).