Do they have a Medic to repair or even fix them after each battle?, like the Autobots have Ratchet, Hoist?
Decepticon Medics Flatline Scalpel Scalpel again Glit Shattered Glass Hook Knock Out Medicroid Shattered Glass Mixmaster Shattered Glass Scavenger Shattered Glass Scrapper
i think the constructicons were probably the decepticon medics. They built megatron, so i'm sure they know a thing or two about repairing battle damage.
In the Marvel comics continuity, the 'Cons had an unamed Medic who worked alongside Spectro, Viewfinder and Spyglass.
There are so many versions of this thread existing: A Decepticon Doctor decepticon medics? did they exist? Anyway, in answer to your question, the most predominant Decepticon medic in G1 was Hook. His function was "Surgical Engineer". The rest of the Constructicons also acted as medics.