Avernic Catalyst has a big upgrade path that is potentially a longer grind than getting the catalyst itself. This is like the Arcane Sigil req for Elidinis' ward.
The solution here is similar to Elidinis' ward and Masori's armor. Adjust avernic catalyst to still be usable in a weaker form without all 3 cerb boots.
It could sit above Aranea boots in stats, and give Avernic Treads a tiny bump in offense.
For example:
Stats:
Avernic Treads (buffed): +6 str/+2 range str/+2% magic/+1 prayer
-other stats same original proposed Treads
Avernic Boots: +5 str/+1 range str/+1% magic/+1 prayer
-other stats same as Aranea boots
Mechanics (optional*):
- Avernic Treads = Avernic Catalyst + 3 cerb boots
- Avernic Boots = Avernic Catalyst + Aranea boots
-Disassemble Avernic Boots to get Avernic Catalyst back, but lose Aranea Boots.
-This way you can upgrade to Avernic Treads when you get the 3 cerb boots.
Maybe just skip the Aranea boots combo part and just drop as Avernic Boots?