Ways to improve this design?

Horus Lupercal

Primarch - Warmaster
Professor
Swingin' on a Star
Deja Vu
Biker Mice from Mars
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Floater
Copycat
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#2
Generally, less titans. Swap them with hawks.

It depends on what you want it to do though
 

Horus Lupercal

Primarch - Warmaster
Professor
Swingin' on a Star
Deja Vu
Biker Mice from Mars
ET phone home
Floater
Copycat
Registered
#8
Yeah, swap the core hawks for frontiers.

What are you using for the second stage?
 
#10
This is just me but I tend to go with a smaller diameter rocket after the 1st stage. That is just my aesthetical choice though.

I also second Horus point about the engine swaps.