We present a comprehensive analytical framework based on detailed balance (DB) and thermodynamic limits to assess the performance limits of bifacial tandem solar cells spanning multiple configurations. Our framework encompasses unconstrained, current-matched (CM), and voltage-matched (VM) configurations. It explores the performance benefits of incorporating area-decoupled subcells across layers and examines the impact of having monotonic and non-monotonic arrangements of bandgaps. We show that strategic usage of non-monotonic arrangement of bandgaps under optimal albedo conditions can significantly increase performance. Additionally, we explore the impact of radiative coupling between layers and highlight the enhanced resilience of unconstrained and VM configurations to spectral variations induced by environmental factors such as shading. This may provide critical design guidelines for designing and estimating the maximum performance limits of these advanced solar cell architectures.