Primitive Archer

Interesting question.

I'd have to go with number 3 as I'm not a fan of whip tillering at all, really dislike how it looks and feels.
I've found stiffer outer limbs especially when Eiffel towered like in your depiction are much better when left stiffer and barely working.
Additionally I've found whip tillered tips to reduce early draw weight and lower performance and arrow speed though this is with my limited testing
and admittedly biased perspective.

The performance aside durability wise it'd be safer to have the widest part of the bow bending more and storing the most energy. 

I'm sure there are situations like the deflexed willow bow tips in some native American tribes where whip tillering is more advantageous
but for hunting use I believe they'd only be a negative.

That's a great program you've used for simulating the bows draw, would you mind sharing what program you used?

Cheers

Isn't it the shallow angle at brace that gives the high early draw weight and increases stored energy?
whereas  excessive angle at full draw leads to stacking or an increase in apparent draw force but  not stored energy?

Yes, just like that! If you play with VirtualBow, you will find that the more string contact there is (especially with deflex–reflex designs), the more energy is stored. However, this requires that the string contact opens; in other words, there must be no string contact at full draw. See Model 4 with 90-degree recurves: because it does not open even at full draw, it is not a good design.

However, measuring the string angle at full draw is not very practical. As Simk said earlier, “It’s enough if we understand the concept and know the general guidelines to keep the angle low.” With the VirtualBow program, it is quite convenient to model different kinds of bows and gain a better understanding of bow behavior.

Patrick has made probably the most powerful bow for its draw weight ive ever seen. He isnt on here much anymore, but his handle is Lebhuntfish.

It was built using this (his original) form.

    I misspoke earlier. It is the Gary Davis form that I adapted as my regular.

I copied Gary's for at MoJam many years ago and it's the only reflex for I have ever used.  My D/R form is an adjustable model that I also copied from a MoJam form that was made by Patrick Bumgardner.

THANKS