Hey! Can dex/necro, say. summon 6 greater undead, and solo a Troll in jungle, by also spamming spells on him? Or undeads will not buy enough time and deal enough damage to tear the troll apart?
The problem with walkers is that they reduce your mana regeneration for each one that you control. 6 greater walkers on a vheela and you will have almost no mana regen. The walkers wont do enough damage to kill the troll and you wont have any mana to either heal your walkers or damage the troll. Eventually the troll will kill all your walkers.
The only pet i know can tank a troll is a max level turtle, and it takes 2 fat mages to heal it while it slowly kills the troll.
If you go ritualism you can use a risen caelano and have someone help you heal. Ritualism is fairly good in general if you already have necro. Easy 100 points to spend.
Tamed turtle only needs one fat mage really. Do it all the time.