Level 5 - I take the fastest route to get to the cannon. Nitro is not able to defeat the cannon like Havok since its plasma sword doesn't have that much vertical reach. Nitro has to fly and fire in diagonal. Ballistic has to stand more to the back and use its charged shot, but it takes longer than Havok too. Now, I didn't use rockets or stronger bullets, but looks like a difficult time to beat pathwise. 6-1 - I go as fast as possible, for this it is better to pick rockets on the way to clear the way. Later I am not given rockets so I have to waste some time. 6-2 From Nitro, Ballistic and Spider, Nitro is much much faster doing the level, and is very fast defeating the boss. Provided he has rockets. Rockets speed that battle A LOT (well if you manage to hit with them), so they are a must if you want speed. Ballistic takes ages to get to the boss, Arach takes less, Nitro, with rockets, can finish this area by the time Arach would be starting the boss battle. Havok takes about as much as Nitro or maybe less but you don't start with him (you have to die while using it to start the level with him). 6-3 - Now we gotta scape, this level is pretty quick as you can see.