Double support combinations are ideal with Neeko. Since its E can root enemies through minions, the other sup then easily root them again and finish the enemy off. This champ is ideal if you don't want to play adc but forced to play it. The 2 Support technique is ideal but requires some serious dodging skills.

Remember to feed your teammate because otherwise, team morale may be down. If this is the case make sure to swap ignite with exhaust.

Your enemies aren't stupid, they're going to catch on that Warwick is not a Warwick.
Make sure to turn into your ADC and switch places with them so that it's harder for the enemy to figure out who's who.
Send copies of yourself from one bush to another to guide them. (make sure the bushes aren't warded)
Roam the map disguised as your jungler and help your teammates.