No way 2 tapes work good. Either you get a snug fit around your waist so they don't fall down, OR you get a snug fit around the legs so it doesn't leak a whole lot. Getting both is a literal impossibility with a 2 tape diaper.
4 tapes tend to work good enough, both top and bottom- well assuming you have upper and lower tapes, not upper and middle tapes anyways. (Stupid tape landing zone limitations don't work either).
Now it's been a long while since anyone has made a good diaper with 6 tapes. However, back before depends and attends sucked they both used 6 tapes. The added tapes in the middle provided for a much more snug fit, and prevented diaper sag really well. This would probably be the best from a functional viewpoint, but if only someone offered them.