I always like to have the jib set so that the top telltales break 1st ie. slightly twisted open at the top. Which is how yours is set.
The fact that you are sheeting hard to get to this point, and you don't have the option of tightening the leech, would indicate that that either;
Jib blocks are too far back
jib is mounted too low on forestay
Jib is mullered - get a decent one!