The more I think about it, the more I like the idea of Laine playing with Granlund instead of Barkov.
I'm afraid that with Laine, Barky would force passes to his buddy, and Laine would be heavily marked. I'd like Barkov to play more selfishly and shoot more, while Granny will be a pass first player no matter what, and with his passing form this season he will find Laine's tape. That leaves us with top lines built around 3 "tutkaparis", Barkov-Rantanen, Aho-Teräväinen and Granlund-Laine. Next, need to find players to complement those duos.
My team right now, with top 3 lines having somewhat similar TOI:
Kapanen - Barkov - Rantanen (The idea is that Kasperi plays a similar role to Anthony Duclair next to Barkov: Speed, speed and some finishing ability. Barky and Moose can both pass, shoot and defend.)
Teräväinen - Aho - Puljujärvi (The Carolina duo is a no brainer, and Pulju has some history playing with Aho. He also brings speed, strength and straigth forward play.)
Hintz - Granlund - Laine (Granlund passes, Laine scores. Hintz brings much needed speed to the line, and he is a scoring threat on his own, so that Laine can't be hard focused on without risk.)
Lehkonen/Kakko - Lundell - Armia/Donskoi (Lundell has deserved the last center spot in my mind with his solid two-way play. Lehkonen-Armia have experience playing together and are used to small minutes, but Kakko has been playing well lately while Armia hasn't been that great. Donskoi is playing okay but very snake bitten. Tough choice, I'd go with whoever is playing the best at the time of the selection.)