I am not very familiar with Anaheim. But from other discussions in the off-season I got the impression, that Comtois is their highest rated wing prospect, who combines size with goal scoring. He already left traces in the NHL at a very young age and still has another year on ELC next season. Timashov despite being more than 2 years older, just made his first steps in the NHL this season. I would say there's a substantial value gap.
Comparing Kapanen and Mason is difficult, as they play completely different positions. In general RHD with the ability to play on the first pairing are in high demand. Even more so for Anaheim, which traded away Montur and Vatanen in the last two years and have no alternatives for Manson on their roster. While they for sure would like to add Kapanen, it would not be at the expense of Manson.
Ceci is a RHD, but Ottawa was eager to get rid of him, Dubas didn't want to commit for more than 1 year and on HFB he is in most TML trade proposals. I don't associate a lot of positive trade value with him. Best case he is not considered a cap dump. I fully understand why he is included in your proposal as TML is up against the cap and there are very few contracts alternatives available.
In short, there is no solution to the riddle. The only pieces Toronto could substitute Ceci and Kapanen with (which also would be of interest for Anaheim), are the once you don't want to trade: Rielly, Nylander, Marner, Matthews. Muzzin's age, term and handiness doesn't make him a fit. You might could try to add Sandin or Liljegren at the trade deadline, when Anaheim is clearly out of the PO race and I know Toronto blocks, when Sandin is mentioned and I doubt Anaheim would bite with Liljegren. Ergo: Mason remains a Duck.
