I just created a DK (Human) and did all the starter quests and yadda yadda, but when i see other DK's sometimes they'll have Tree Ents as minions. The only way I know to get a minion for my dk right now is to raise undead, and that doesn't last more than a minute. Not to mention I need corpse dust.

Also, what is the best talent tree to go for? I have mine invested into blood but I can always swap out to frost or unholy if they are better?