Burst&sustain item
I recommend this item if you want to play cyclops mid, you can also play jungler because it's sustaining and so you don't have to be afraid to counter.
Burst item
I chose this emblem set because the sustain of a cyclops is very strong and because its skill cools down quickly.
Battle Spell
I chose this battle spell because it's a good combo to use with his ultimate if the enemy flickers out or dashes out.
Strategies
What you should do in the early game is not to let your lane go, wait until you are level 4 and rotate to the lane that needs more help, but it's better if you visit the exp lane. Then when there is a clash, you only get a free hit because Cyclops' skill cools down if it hits creeps, heroes, and jungle monsters.
Best With Alice
80% co-op win rate
Alice often brings sustain, tankiness (especially in newer patches) and control via her abilities. Cyclops brings burst, pick potential (immobilization via his ultimate) and good consistent damage. Together, they can cover each other: Alice can soak damage / disrupt, Cyclops can finish off
Watch Out For Esmeralda
100% counter win rate
I think Cyclops is a counter to Esme because you can sustain and you can really burst an Esme in the clash.