The article says (roughly):
"The SynergiesMod for TL2 grants tons of new content for the game. 108 elite monsters, 6 rare dungeons, 28 raid dungeons, 11 world bosses and the necromancer, a new class, are only the beginning.
Besides that, the developers added four sets of legendary armour, 16 legendary weapons as well as new quests. The mod is for free and will probably add some hours of gameplay." Then the necromancer is described such as "The Necromancer is playable as a pet class as well as a melee-damage-build, and is quite adjustable on the whole."
"Despite the already impressive size, the mod is not at an end. 24 (!) more classes are planned. If they will actually differ a lot, the game's replayability would get raised drastically."
Then there is a download link and a promo video or so, which gets mentioned in the article as well.