Just curious what the important stat is....if any.

I notice all the combat related outfits are Str based so I assume the higher the str, level and weapon damage the nastier you are.

The question is, what is the ratio of importance.

Any clues or ideas?

Very little testing has been done on this. General theory is str damage, lvl for hp, luck for gear and caps, end for damage reduction. Seems to me int is for stim pack potency. Heard agi is related to weapon acc... but per and agi seem to be a mystery still.

Level increases HP, I think I saw that on a loading screen tooltip, or in the guide in the Pipboy... But I think that Endurance also reduces damage taken. Haven't tested it though.