Rated 4 out of 5 stars

As you suggest me, I would like to use ABP just for FR List, keeping using Bluhell. In ABP should I keep EasyPrivacy and MalwareDomains on ? No risk of conflict or slow down using both plugins ?
Other question : On a specific domain (www.leboncoin.fr) Bluhell hides the homepage but not the ads. Seems not to be an EasyList problem.

This review is for a previous version of the add-on (2.0.1-signed).  This user has a previous review of this add-on.

EasyPrivacy is also included in Bluhell, even a few hand-crafted domains known for spreading malware are included too, but i didn't put much emphasis on adding more of these since Firefox comes already with good malware lists by default as distributed by Google. There shouldn't be any conflict on using both extensions at the same time, i'm aware of several users using that combo (plus the Element Hidding Helper add-on)

Regarding leboncoin, try cleaning the cache and cookies for that site, since i wasn't able to notice anything strange by visiting it.