If you just want to have fun, then sure. If for competitive pvp, stacking melee shaman might not be optimal. You just need 1 for bloodlust, tremor, that's it. Enhance survival is shitty. DK + 4 shamans, you would have slaves dying left and right. You can live as long as wolf + shamanistic rage. Then be naked after that.

Also melee is all about the frontal burst, you don't have the tools to hang with all the wizards. You have to kill them ASAP. and for frontal burst, enhance is not the top choice. Retardin with wings, Warrior with reckenless are better.