Your way is okay, but you risk getting more wounds than you have targets. It's always a shame to waste a 6

If shooting at a specific target we roll each shot separately using multiple dice to speed things up. We use a green die (think green light) for the to-hit, red die to wound (think blood), and as many white dice as needed for any in-the-ways.

If shooting at a group we make sure the wound result needs to be the same for each target in the group, then we can roll a handful of to-hits, etc.

You can roll all your shooting dice at once as it makes no change at all in the chance of any particular model being hit. You can also roll all the 'to wound' rolls at once as well providing all the targets have the same chance of being wounded. This speeds up play no end.

You can roll all your shooting dice at once as it makes no change at all in the chance of any particular model being hit. You can also roll all the 'to wound' rolls at once as well providing all the targets have the same chance of being wounded. This speeds up play no end.

If shooting at a specific target we roll each shot separately using multiple dice to speed things up. We use a green die (think green light) for the to-hit, red die to wound (think blood), and as many white dice as needed for any in-the-ways.

When you do this, it is best to use different coloured dice for every target in a completely different place to the others

Also, when we play, we say that if you kill your targeted model, any remaining shots/wounds go onto the model directly behind him and so on

And for different strength bows

But then you know for instance how many are killed on the right flank and oe many are killed on the left

No i'm sorry but rolling all your dice and saying "Well i got X number of hits so i am going to place them all here" is an incredibly inaccurate interpretation of the rules.

I have tried it, it results in you, or your opponent being able to target a group of models, with the intent of only killing 2 soldiers or so for example, then, upon realizing you have scored many more hits than you thought you would, choosing instead to target an enemy hero with the shots. Stuff like this only occurs when you have the gift of hindsight to know how many hits you happen to score, had you followed the rules, scoring many hits on the enemy hero would only have happened had you taken a massive risk and lumped every archer on the enemy hero. Rolling all your hits then splitting them up as you please is against the rules, removes any sense of tactical target selecting, and is just meta-gaming.