First off, you should never use one of each totem. They have different uses. Two of the five are buff totems to provide damage boosts to weapon damage builds (summons for example). The other three (fireheart/stormeye/frostclaw) are spell damage based, which, in most cases, you use summons as tanks to receive incoming damage and protect yourself, while the spell totems put out attacks to kill the monsters (and fast kills too) for you.
There are two totem necromancer guides in the guide section (though this next patch might outdate some of the information about uber location and content). HechtHeftig wrote one for a summoner/merc buff based, and also made a lazymancer showcase video that focused on teleport when struck and pestilence with poison spell buffs and no actual attacks at all besides pestilence's aoe poison.
The other is the pure spell damage totem summoner with summons as tanks while the totems kill for you, along with a bit of hybrid with caster, using skills like Boneyard and Funeral Pyre depending on the situation.