Magus Lucea Kane and Magus of the Candelabra do not have summoning sickness.
Steps
Activate Magus Lucea Kane by tapping it, adding ({C} magic symbol) ({C} magic symbol) , and copying the next spell you cast or ability you activate with ({X} magic symbol) in its mana cost.
Activate Magus of the Candelabra by paying ({1} magic symbol) and tapping it, targeting itself.
Magus Lucea Kane triggers, copying Magus of the Candelabra's ability, targeting Magus Lucea Kane.
Resolve both abilities, untapping Magus Lucea Kane and Magus of the Candelabra.