When I used hogs at th8 I used 34 hogs, 4 wizards, 14 archers and 3 heals. In my clan castle I took 6 wizards and 1 archer.
The strat goes like this
1. Lure out cc with 1-2 hogs.
2. Take them to the corner and kill them preferably with all your archers and two wizards.
3. Try to spot giant bombs inside the base. If they are on the outside layer use 1 hog to trigger them.
4. Place your hogs at two separate entry points that are close to each other.
5. Heal when hogs hit giant bomb or are taking serious punishment from defenses.
6. Once most of the defenses are gone place your barbarian king and clan castle to clean up.
7. Enjoy the three star victory

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Here is an awesome instructive video to help:
https://www.youtube.com/watch?v=29XjUFmmdik
Hope this helped