Fast Rex or fast ST Han?

Hi all,
I run Rex (L)
ST Han
Lando
JKA
B2

All 7* and all gear 11.

My ST Han is at 215 speed (speed secondaries added 89 for those who don't know)
Would it be better to put those mods on rex and get him to 229 and add in boba or TFP to my team?
Don't have wiggs but I'm working on wedge right now. Will this team survive a meta shift or should I change who I'm farming?