The basis of this idea is that you can never have enough pitching, and the holes we had due the injuries (Steele, Wicks, Brown, etc). And you can't ignore the Prof's diffulties as having contributed to 5-6 losses.
My hypothetical trades:
Seattle trades: Bryce Miller RHP TOR starter (3.5-4 fWAR), top prospect Harry Ford (C) 50 FV
Cubs trade: Kevin Alcántara, Matt Shaw, Moises Ballesteros (All FV 50), & Matt Mervis (35+ FV), MLB player Daniel Paliencia for their BP.
That addresses starting pitching and your catching but you give up 3 top 100 prospects plus a possible lottery ticket in Mervis. It may seem top heavy from our side but you have to give to get. And even then some may say it is not enough going to the Mariners or vice versa.
In a second trade I would send over Triantos & Cruz (both 45+ FV) to the Jays for 1 year of Vlad Jr. If he finishes 2025 with an fWAR of 6+ he will command 35-40M per year. See if he bites during the season on a 6/225M extension with an AAV of 37.5M and opt outs in years 3 & 4.