Estarossa, of course, is inferior to Tarmiel and Sariel, but we'll assume he's equal just for our purposes. 1.043582982790 Teratons (Small Country level)
Derieri can tank her own Full Counters, and both Estarossa and Post-Time Skip base Meliodas could fatally/semi-fatally injure her. So we can downscale her to well under half of the Archangels. 521.79149139 Gigatons (Large Island level)
2nd Mark Meliodas has a higher power level and withstood a considerable Combo Star barrage from her, so we can downscale his base by 4x. 130.44787284 Gigatons (Large Island level)
So, Large Island level for Estarossa, Derieri, Drole, etc makes sense, imo, and maybe Island level or at most Large Island level works for Ten Commandments Arc Base Meliodas.