I'd say level them up. Han might bite it if you try to taunt with him. Watch out for Leia and Ackbar falling to AoE. Although if you are running Wedge lead instead of Ackbar, they can recover their own health better. Also, with your Biggs so high and his cooldown on omega, you might clear it before you have to worry about the squishier characters. It really is easier than you'd think.
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Easily, yes
You might want to level them to 70/75 to make it easier - or save some credits and droids just in case