Any point in playing a mage to level 60 if I'm not going to raid with it?

[NPC]

Even without epic focus 49th level mage pets are powerful. The earth pet 49th level with low level foci can have 3600hps and only costs 200 mana to summon. At 50th level you are medding 20 mana tick. So you could summon one 49th level pet every min infinitely.
My 49th level earth pet with foci can solo Ice Giants and most mobs in KC. Get a Burnt Wood Staff and you're set.