Handling vs grip

[totta Crolla]

I'm after some advice from people who may have tried some different setting.
After a considerable time and a lot of experimentation I have got my car handling really nicely, well balanced and extremely 'chuckable'
That feeling of pushing really hard into any corner confidently knowing you can adjust either by throttle or steering to suit.

BUT it is only like this on tyres with reduced grip, i.e old hard worn gravel tyres used on tarmac.

Do I need more of a drift setup on my rallycar to reduce the grip maybe to gain handling and speed ?
Perhaps I just need more power....
Any thoughts please