It's amazing we created buy classic wow gold
These things helped Mages a LOT, however, I wouldn't go so far as to say we've never utilized to run out of mana. We had to hold-back to increase mana-management on abilities that are higher-DPS , particularly in longer raid-boss fights. It was fairly normal for a Mage to utilize his Wand prior to the CD of Evocation or a mana pot/gem was up.
I levelled solo through Vanilla as a holy priest for the first time. So many of the attack spells on holy/disc priest were feeble, bad and huge mana costs, you could tell when a healer could cope even remotely any 34, Blizzard was scared. You had to waste so many abilities to create them remotely useful and even then it had been a waste.
Had to drink after 1 mob and when I pulled 2 I had to retreat or melee them down with self heals. Inner fire gave melee attack power (???) Along with your shadow spells your very best friend and fire needed a 5 second cast time, smite didn't hit greater than the usual staff melee hit.
Top off it before lightwell was released at the pre TBC patch, we'd Holy Nova as our 31 point talent, and it'd NO healing aoe damage, to get a significant mana price, was a complete joke. Vanilla is just full of redundant ideas that were half assed at the last minute and were never changed for most of the time until pre TBC patch, it's amazing we created perform with such shonky course layout.