Combo deal with Anaheim for Dumolin and Vatrano? Dumolin provides a very solid 3rd pairing defender who can play up in case of injury and has considerable playoff experience. Vatrano can slide in on the 2nd or 3rd line as needed and adds additional scoring and versatility for an improved top 9. Neither Kreider nor Tuch is realistic at all, whether it's cap, acquisition cost, or simply not being g available most likely.
As long as Tampa can get retention on Vatrano, I think it could work. I do think Lilleberg is improving, but adding an additional 4-6 type dman to the group of Lilleberg, Perbix and Raddysb wouldn't be a bad thing for the playoffs imo. Vatrano is more needed and will cost, but as long as Tampa is planning on extending him, paying the price is likely justifiable.