To drop 12 Paladin levels will require 3 weeks, two +5 lesser hearts, and 1 +3.

TBH, you have the khopeshes already, including lit2 and 3xpos. Do you really want to recraft everything? You can use cleave etc, it's not as good as thf since it's mainhand only, but it works. Rachail is a twf khopesh build, with O crit.

THF has much more synergy with the dps eds now, and of course the eSoS. Which you don't have. So for you, the differences will probably be minimal.

More after work.

Rangers are slightly above Paladins dps-wise, about even on survivability.