I use orals for strength and size like dbol and drol for plataeus... hardners and cutters Generally towards the end of cycles... or in my case, just for show prep...
Both are good. A kickstart is great to get you going while your waiting for injectables to kick in. The finisher is good because it helps solidify gains at the end and it can enable you to run an oral for the couple weeks leading up to PCT while your waiting for the longer estered injectables to clear.