Homing missiles try to first fly to their notional cruising altitude before trying to home in on the target. You can see the Guardian GI rocket climb up, fly level a bit, and then aim back down to the target. If the missile is launched from above the cruise altitude, it does the same thing, giving you at best an S-curve trajectory... it will never fly straight to taget unless ROT=1, but then it will also likely miss.

So what's the goal here exactly, do you want the dropping effect before the missile shoots off, or do you want a straight path to target?

The only working splits demo I've seen was with a projectile dropped into the water to become a torpedo after. I don't know if there's a way to control where it splits exactly.

But if variety is what you're after, you can make twinned missile voxels, shorter than what I have here, used with the ROT=1 weapons, and it will appear to be a barrage from both sides of the aircraft.

You can also experiment with tumbling bombs, take away the line trails and with a lower speed, just let them fall into the target.

1. Make weapon that falls down when fired
2. Use DetonationAltitude= to make it detonate below the plane
3. Use Splits= to spawn a new homing weapon.
4. profit...