you can use System-Compare, that one allows you to compare anything. The objects that satisfy the comparison will be picked.
Just to clarify (in case people find this thread via search in future etc): system compare deliberately does not do any picking at all. However, you can simulate the effect of picking by putting a 'for each' above it. Other comparison conditions, eg. in the sprite object, pick normally.
be careful with overlapping at offset, it's hard on the cpu.
No more so than ordinary overlaps, which don't usually bottleneck performance.