Slimes

[Elvang]

When do slimes start hitting harder?
Do they stop hitting harder?

[JustAnotherDay]

After about 3 hours as far as I remember & if nothing has changed since Tibia 8.2/3/4

No, they don't stop hitting harder if its like it was on the higher mentioned versions

[Elvang]

Is it possible to train after they become stronger, if so what skills/equipment do you need?

[JustAnotherDay]

It is possible however its not really profitable, its best to just change the slime.

[fAux]

If your playin non pvp make char level 50 and buy utura and train 24/7 without waste (only food)

[Infernal Bolt]

Elvang the slimes are basically getting skills so that's the reason they hit harder.