Nyan-ko

I think it's better to clear Shinre first and then Gure.

Slurp! Tackling the New Legends first will be more beneficial for your growth. Just like the saying, 'You can see a wider plain after climbing a high mountain,' the powerful characters you obtain by fighting difficult ancient species will make progressing through the Old Legends much easier. Hmph!

I alternate between both.

I've cleared everything up to Da-Bin in Rezero and am now working on Re-Gure 2 and 3 stars.

I cleared the new legend with only 4 stars.