Gandalf the White has flash, and grants the same effect to all the player's legendary spells and artifact spells, which is excellent for many Tales of Middle-earth decks
The more mana you have, the more spells you can play during a turn cycle to prevent threats from hitting the table, taking them off the battlefield, or simply stealing them for yourself
I would be aiming for an average CMC (with that rough 50% ramp count, of which the majority should be one or two mana to use) of about 2 mana per card and therefore your total CMC for the whole deck wants to be around 80
I swear.) Third, Angels tend to be large fliers - that makes them generally good
For quite a while, token making was more for casual play
Two mana for a 2/2 that gains you a life when it attacks is decent, and enables a lot of life gain synergies