Mage pet info please

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New to a Mage, new to pet classes, any information would be appreciated.

Mage hot keys for pets? I know /pet attack lmao
Is there a pet window in green or a way to view Kebabors health without targeting him?

Which pet is best for solo or is it situational etc?
Is fire better then water for dps?

Should I only buy certain spells while leveling?

Maybe some spell questions such as which nuke to prioritize? Fire ball or blade spell?