Debicubic and debilinear would be the most common, but the situation is often complicated by lossy compression and getting clean results is difficult
Another approach is to interpolate over the combed frames . A recent example was posted in this thread
https://forum.doom9.org/showthread.php?t=183705
Rife tends to do a better job overall than mvtools2 in many situations , but it's not available for avisynth (only vapoursynth) , but any type of intermediate interpolation can often have various issues with edge artifacts, blending, errors