So I found the solution about the randomness on the roper scheme.
Let's start:
First of all, the scheme has to drop a crate every 2 turns.
Those crates give simply 0 hp.
Raise a bit the hp of the worms.
So now we set everything, there is the point:
The first crate drops: it's the checkpoint.
The first player must collect the crate, attack, and then go hide.
The second player (who has no crate dropped), must go to the last checkpoint (which is just the last cratepoint) before being able to attack.
Then another crate is dropped.
The first player collect, etc...
And it's all over again.
So both players has the same crates/checkpoints to reach before being able to attack.
This way, the most skilled player will win.

If you understood, what do you think about it ?
PS: I'd like to attach a replay, but I really don't know how to make the scheme drop a crate every 2 turns.
Maybe I could find, but too bored to do this. :roll: