Problem you'll have is that the Leafs have home ice and line matching will be largely under their control.

Swith Armia and Anderson.

Anderson's most common linemate this season was KK with a GF% of 54 together (EDIT: KK's most common linemate was Anderson, Anderson had the best GF% with KK as his C). He had a GF% of 47 with Suzuki and 33 with Toffoli.

Suzuki's best linemate this season has been Armia with a GF% of 67. Suzuki's GF% with Toffoli is only 42, however Toffoli's best linemate is also Armia with a GF% of 71. Suzuki and Toffoli are also Armia's best linemates. Since Armia has been on that line it has been successful.

I think this stems from Armia playing a puck control game and making plays with his hands, where as Anderson just plays a North South speed game.

So:
Toffoli - Suzuki - Armia (Offensive Line)

Perry - KK - Anderson (Checking / Crash the Net line)

That could work as well. But my logic was simple - Armia hasn't gotten a point in the last 7 games of the season, which he's played primarily with Toffoli and Suzuki. Although, I agree with your statement about Armia's puck control, it hasn't produced a lot of offence for him. Suzuki has started producing again for two reasons imo, he's skating again and has started to shoot the puck more. Both Suzuki and Anderson clicked for the first 10-12 games of the season and I think the Suzuki can get Anderson going again. Armia has had chemistry with KK before. Maybe playing with his countryman can get KK going again. And Armia's puck control will mean KK can hopefully get a few more shots to the net instead of having to chase down the puck all the time.

As for Toffoli and Perry, I truly believe it doesn't matter who they play with. Those guys are gamers and Stanley Cup champions and find a way in the big games. They may not score every game but I think when the Habs will need a goal to tie or take the lead in a crucial moment, they'll deliver.

Then your logic must apply to Anderson as well right? Anderson has 0 pts in his last 10 games and he is -8 over that time. Armia has 2 pt in his last 10 games and is +4. Armia's role with Suzuki and Toffoli is not to produce it is to do the dirty work for them in the corners - it has noticeably freed the other two up to make plays.

I know you are thinking we have to get Anderson going, but there is nothing to suggest putting Anderson with Suzuki and Toffoli will do that considering Anderson had GF% < 50 with both players this season. The truth is Anderson had chemistry with Drouin (53% GF), I really didn't see the chemistry between him and Suzuki. Anderson's best C this season has been KK (54%). Anderson and KK have both been struggling as of late, but they could easily handle a physical checking role in the playoffs IMO, there games should be better suited for playoff hockey.