Best Warframe Ability

Which ability is the best ? You can make your choice based on : 1) How good is it in a vacuum (on its own, without any buff, outside of the frame's kit, no augment) ? 2) How good is it with and without its augment (if any) ? 3) How good would it be on other frames (similar to Helminth) ? You could also weight your choice based on all options.