I can assure you no classes had much of the "flow". Rogue worked probably the best, cause it had reliable resource that never ran out. Yet still it was sinister strike x2 - wait - sinister strike - wait -sinister strike -wait -eviscerate. All mana classes aside from hunter were a nightmare to level. If you went full blast, you were OOM within two mobs. Anyone who could equip wand also used those regularly, something which is completely unheard of post Wrath.