Very simple and small mod.
Patch ImprovedMobs to let it deal with "ranged melee attacks" like SlashBlades properly.
Currently, it has one feature:
add a new configuration item "blazeFeatureRange" in the "blaze" part of the config file of Rough Mobs Revamped mod.
Only when the attacker is in this range can a Blaze applies its features on attacker.
This may be a bit abstract, but let me make "before & after" videos for you to compare.
This project uses a portion of the source code of its dependency project, Rough Mobs Revamped; therefore, in accordance with its open source license, this project is open sourced under the GPLv3 license.