Any tip for 3* DS 9B Hard node?

Yeah you're just a little undergeared from the looks of it. You usually want a full g10 team with synergy. As in not just Boba, Kylo, TFP, Tarkin and borrowing a Zaul lead, as that team has very little synergy. Borrow a Zaul lead, use Vader or EP as your lead, use TFP, Nihilus, gear up EP and then maybe toss Kylo in the last spot.

Borrow double zeta thrawn and go with your empire team would be my idea.

Or possibly borrow a zader and have a mixed Sith empire team with Palpatine lead.

Ahh done with G12 Krum ally :) Taunt saved me. My team was Tarkin TFP Vader Nihilus Kylo