Salamanders are a meme even from jagex's perspective, requiring them for various CAs.
Some various ways to improve upon them are:
- One handed
- Reduce attack speed from 5 to 4 (4-3 on range?)
- Add a tile of range to the range style (maybe mage too?)
- Give more unique variety to the salamanders (Did you know that the swamp lizard can poison?!)
Etc..
Just increasing the tier and changing the accuracy/hit is likely not enough to see these guys used other than CA memes.