Not a bad roster at all. I'm good with the OTT and NYR trades. I don't know if moving Jarnkrok is essential, but given the other moves you've made here, I'd rather get just picks/prospects instead of taking a roster player back. I think Grimaldi is a little out of his depth on the 2nd line though. I think I'd rather see Tolvanen or Tomasino audition on that line, and bump Grimaldi back to the 3rd.

Not to come off as too much of a homer, but I think the values of Sanford and Jarnkrok are pretty even. I’m a big fan of Jarnkrok and could be open to a deal, I’m just not sure replacing one ~15-20g scorer with another who's older and makes more is the right move for the Blues.

The sens need a RHD on their roster that can at least play. So I don't think they're trading Zaitsev for a more expensive Turris that both him and the Sens have moved on from each other. Plus they don't need a Centre unless he's a top line C.
It just doesn't solve anything for OTT

Totally cool with a Turris for Zaitsev swap, but it would be 1 for 1

Rangers decline as we wouldn't have the cap space for this deal.

It doesn't make sense for the Blues to move a 25 year old signed at $1.5m for a 28 year old signed at $2m. Over the past two seasons Järnkrok has produced at a pace of around 33.8 points per 82 games, whereas Sanford is 35.2 per 82 games.

I don't see the incentive for the Blues to do it one-for-one, never mind adding a pick.