Though many people think having both Taka and Koshka on the same team is pretty pointless, this almost marks an equal mark on the 2 heroes. However, they are definitely distinct in various ways, while both heroes possess some of the best abilities, it is the strategy that matters on how to utilize them properly in order to dominate the game

I've attempted this build multiple times with my friend, with proper timing and chemistry, the setup pretty much makes the game an instant win.
Impressive numbers, huh?

Here's how to split the work.

Adagio - Lane / Protector

In early game, adagio should focus in lane, try to get as much gold as possible.
When the opposing team has 2 laners, keep out of the dangerous spots, use the healing ability on minions to splash the fire near the surrounding, do this very often when the opposing laner is a close-contact hero.
Be very clear of your own job or role, do not risk and hunt just to go after the kills, if you can cause a deal of damage, that will be enough.
Keep an eye on the map all the time, roam into the jungle when your teammates are struggling in a combat.

Taka - Assassin / Leader / Upper-Jungle

Though Taka is an ideal jungler, still, be very aware of your health stats, because a single distraction can get you killed very fast. Here's a simple thing to remember, POTION IS YOUR BEST FRIEND, you cannot expect Adagio to tag behind you all the time, heals will come in very handy when you have them.

Kaku can be used offensive-wise or defensive wise,
When you found yourself trapped in a 3 vs 1 ambush, DO NOT try to fight, use Kaku and weave yourself a path out of the war zones. However, when there is a flare gun in play, RUN is really all I can say. While using Kaku, run in directions which the enemy wouldn't notice and predict. (opposing sides or bushes nearby)
Looking at the map makes up about 50% of your odds in winning, check the lane all the time for low health enemies, if you think it's a appropriate time to head up for a surprise, you are more than welcome to do so. Use Kaku to enter the war zone unnoticed, or camp in lane bushes, when the timing is correct, use the Ult for a instant kill.

Do not be afraid to risk or to go for kills, Taka in the setup can bring in the most team-fight essence, your teammates depend you on a lead, try not to abuse the map marks, because it could get quite annoying and confusing if orders are not delivered clearly. Make it clear to your teammates that you want to camp, to take minion miner(s), or even capture a kraken.

Koshka - Jungle Warrior / Support / Lower-Jungle

The only thing to remember about Koshka in this setup is that she will be Taka's best assistant. Focus on the same target with Taka, and provide him support whenever he needs one, Koshka can bring in fights and escape with Taka as well.