I'm planning DH Shadow Impale because the buff & the bonus is a solid 15 GR levels over season 15. Not to mention cubing a good main hand weapon is the easiest one in the game. (Getting a good offhand is crazy hard though, but less important).
I plan to use UE for T13 farming since impale is not so awesome for trash.
I've never played a LoN build, but that buff will outlast the season. If it turns out there's a massive difference between sets and LoNs I'll switch midseason. How excited to have some unknowns in this game again
Also, I'm mostly solo, I only party when I need a change of pace.
You need to account for the base damage before the set bonus increases it to get an accurate depiction of things. For instance, LoN used to give 100% increase per ancient but now gives 750% increase to your base 100% damage. If you have 13 ancients then it is 100%+(750%*13) = 9850% vs the old 100%+(100%*13) = 1400% which translates to an overall damage change of 9850%/1400% ~= 7.04 times damage. If you only have one ancient equipped then it is a much smaller change because 100%+(1*750%) = 850% vs the old 100%+(1*100%) = 200% is only 850%/200% = 4.25 times damage but any reasonable number of ancients (10+) gets close to the 7x multiplier vs the old bonus.
For most bonus increases there is little difference since they are already huge numbers but it can make a significant difference for smaller bonuses.