How to gain Speed in ships Leviathan

Ships speed doesn't depend on pilots speed. Ship stats, including speed, increse when you increse level, mod level (it doesn't matter what mod is) or relics of your pilots, but they don't consider the specific stats of these upgrades.

This is for the OP, I replied to the wrong message.

The below assumes you have six star mods on all crew members.

Where Leviathan is concerned, as with all ships, six dot mods and relic levels matter. Leviathan has a hidden speed boost though, if you are going second.

1. There first turn they’ll target your Leviathan’s engines with their capital ship.
2. Let the fighters go about their business, just target the B2. Then attack their ships engines with your Leviathan.
3. Carry on with the fighters until their Leviathan attacks your hangar bays. As soon as you can launch Maul’s fighter for instant death, then you’ll get the speed boost. 
4. 
   4. Carry on until your Leviathan can attack their hangar bays. You might not get that option, so just use the first attack.
5. Next chance bring out the MK 6 Interceptor and take out Malgus’s fighter with the basic attack. It is an insta kill.
6. If you haven’t already, take out their hangars, then next Levitation attack, you will take control of their ship. From there, hit auto and cruise to victory.