Freshwater scarcity is one of the most significant global challenges, especially in arid and semi-arid regions. Solar still is a sustainable and low-cost option, but its application remains limited due to low productivity and efficiency. This study aims to improve the performance of a conical solar still (CSS) by integrating cylindrical magnets inside the basin to influence the behavior of water molecules and reduce surface tension and adding external reflectors to increase the absorbed solar energy. A comprehensive evaluation was conducted, including energy, exergy, economic, environmental, and eco-economic analyses, as well as sustainability indicators. Five different configurations were tested: conventional conical still (CHSS), still with reflectors (CSS&TER), still with parallel magnets and reflectors (CSS-PDM&TER), still with linear magnets and reflectors (CSS-IDM&TER), and still with zigzag magnets and reflectors (CSS-ZDM&TER). The results showed significant improvements in all developed models, with daily productivity reaching 4.24 l/m2 (CHSS), 5.58 (CSS&TER), 9.46 (CSS-PDM&TER), 7.46 (CSS-IDM&TER), and 8.52 (CSS-ZDM&TER). The thermal efficiency also increased from 32.59% (CHSS) to 43.37%, 72.97%, 56.83%, and 64.86%, while the exergy efficiency improved by 63.13%, 331.30%, 157.02%, and 234.81%, respectively. Economically, the cost of production per liter decreased from 0.0118 $/l.m2 (CHSS) to a minimum of 0.0076 $/l.m2, and the payback period was shortened from 2.36 months to 1.52 months. Environmentally, the combined lifetime net CO2 emission reductions for the distillers were 17.4 tons (CHSS), 23.1 tons (CSS&TER), 39.1 tons (CSS-PDM&TER), 30.8 tons (CSS-IDM&TER), and 35.2 tons (CSS-ZDM&TER), reflecting relative increases of 33%, 124%, 77%, and 102% compared to the conventional distiller. Carbon credit returns were 251.61 $, 334.25 $, 566.28$, 446.97$, and 510.98$, respectively, reflecting economic improvements ranging from 33% to 125%. These results confirm that integrating reflectors with magnets represents a promising approach for achieving high productivity at lower cost and with a sustainable environmental impact.