Reliable VARC sources for CAT preparation are: past 10-15 years CAT VARC papers (primary), past GMAT reading comprehension papers (secondary), VARC 1000 compilation (which relies on CAT papers), and Gejo's YouTube videos for explanation. The OP of this IIM Mumbai thread explicitly said "No mocks are accurate for VARC as far as I know" and emphasized past papers. Don't rely solely on CL, IMS, SimCAT, or TIME mocks for VARC because their quality is lower than the actual CAT paper.
CAT sets 3 papers per year with months of quality control; mock providers can't maintain that rigor at weekly frequency. Active reading sources for daily practice: The Hindu editorial, The Economist, Aeon essays, The New Yorker, Livemint opinion pieces, The Ken. Read for 60-90 minutes daily to build reading comprehension muscle.
For explanations of past VARC papers, Gejo's YouTube is the recommended source; don't refer to others whose interpretations may be inaccurate. Summary questions require identifying author's main thesis and ruling out options that: (a) overstate, (b) understate, (c) miss the point, (d) introduce new elements. Para jumble requires logical flow checking across keywords and transitions.
VA critical reasoning: ALL answer options must be ruled out or ruled in; if you can't decide between two, pick the one with textual support from the passage. Avoid solving too many mocks; instead analyze 5-6 mocks deeply per month. Check your eligibility at collvera.