AI attacks, drops down in red.
So your Warrior is on a rough hill (+6) doubly fortified (+6)
Warrior 1 does on average 18
Warrior 2 does on average 20
Warrior 3 does on average 21
Your warrior then heals for 15
That puts him on 66 HP
Warrior 1 is on 62
Warrior 2 is on 66
Warrior 3 is on 69
Now if it was that simple then perhaps it is not the best but what would your slinger do? It would be mincemeat.
There is often a river for -5 and some impassable terrain and the fact I have enough gold to buy something to help by that stage because the secret is to hold your gold, it is not a case of chopping, it is a case of buying. And If I have 3 warriors that is normally enough.
Seriously... 3 warriors vs a slinger?
As it happens, since last patch they will ignore your troops and just go for your city. This is turning out to be nastier.
Bottom line is the slinger is safer than a builder but not a warrior, you are building that slinger to get to archer faster, not to take the safest build.
I’m fine with that because it is your game but do not tell me a slinger is as safe as a warrior. It is about you safely getting to archery which is strong but you can still lose your city.