Dream also has quite a few buffs for you/debuffs for them when in melee range plus big boosts to both OA and DA. If your intent is to use casting abilities more than melee the DA boosts will still be beneficial to you. Dream mastery includes INT increases as with all the other caster masteries. You get 3 different "trances" (basically auras), among them come damage reflection, adcth, resistance debuff to enemies etc. You also get a passive to increase total speed (and total means total so even your casting speed goes up). You also get some crowd control too.
In my *opinion* Dream is a great choice if you want to play close quarters caster.
I'm assuming Dream is available to you; by "original" it still has IT right?