Without knowing much else about your lease, if you're going for the win, this is fine. Seems like allot, but there's not alot of quality.
Jones - very good but not for this year; it's the Werenski show this year
2 1sts/2nds - should be low picks based on where you're in the standings
Tarasenko - RIP for the year; this year all that matters for you.
Borgstrom - not an elite prospect IMO
Mantha - very good but it's basically him for marchand as all you need to focus on is the cup and marchand massive upgrade
Yandle replaces and is probably an upgrade over Jones (depending on peripherals) for this year anyways.
Those 2 3rds could turn out just as good as your picks as none should be top prospects based on standings
Go for the cup, and quantity doesn't always equal quality.