For some reason I thought OP was only thinking of doing his mix, but apparently he already did, so not much to change there. Compost if fine, even 100% compost would be actually a decent 'mix'. The topsoil not the best idea. The particles are fine and they are heavy, meaning that after 1-2 years it basically sinks at the bottom of the pot where it will make a compact, unaerated layer, and we know how tomatoes like to send a ridiculous amount of roots curled to the bottom. Remixing everything after each season, will probably be ok I guess.
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