[@Kibaro]

Actually, you've got the idea.  It's great for, say, melee-focused baddies that you want to buy time against.  The truth is, the targets get a save for the entanglement (which, let's be honest, it's a 1st level spell, so for now, assume most baddies can make that save), but the real gem is the the fact that the area the spell hits becomes 'difficult terrain', which means it costs twice the distance to cover.  And more importantly, they can't charge through that space.

BTW, you did have an option for an animal companion, but it seems you chose to have the domain instead.  Animal companions do not cost you anything (unless you gear them up).  At this point, it's a matter of personal preference.  An extra spell/level and a domain power or an animal companion?

Buying a trained animal will cost you and will not be as loyal as a proper animal companion.  Honestly I don't hear much about people using those in proper adventuring beyond getting a horse/pony for traveling.  But I've been wrong before lol