Short and sweet...or bitter sweet?
As a general rule the larger the fly...the better.
Fly rodding for bass, at least where I live, is not the best way on average to take large
bass (4lbs or better)...but then, that's not what fly fishing is all about...nicht wahr?
Thinking lake fishing...a man with a fly rod just can't compete with a free spool bait-caster with an arsenal of top, mid, and bottom lures....
then there's the added ability to cover a lot of water fast!
Check with the bass professionals.
If you want to answer the question about big lures for big LMB all you have to do is look at the bass pros on the tournament trail. Most use hefty lures. Many use huge lures. Lure size is one of the factors that limits fly fishermen to smaller fish between 1/2 a pound and 2 pounds MOST of the time. Our flies just aren't big enough to entice the big boys. Just my 2% of a dollar. I'm sure others will disagree. 8T :)