According to the source text, the Suffering ring is not recommended for three main reasons:

• Its recoil is negligible OSRS gold
• Its defense bonus is fairly negligible
• Its prayer bonus is unnecessary

1. The recoil does almost nothing

The text says the recoil from Suffering is negligible, so it does not provide enough value to justify taking it over other ring options.

2. The defense boost is too small

It also says the defense Suffering gives is fairly negligible. In other words, it does not meaningfully improve your survivability in this setup.

3. Prayer bonus is not needed

A big reason people might consider Suffering is the prayer bonus, but the guide says that is not necessary because the setup already uses prayer regeneration potions. Since prayer sustain is covered elsewhere, the ring slot is better used for something more impactful.

What the guide prefers instead
The text clearly says it is much better to focus on Lightbearer as your ring, because:

• Lightbearer is the melee killer ring
• It lets you blowpipe spec more often
• Blowpipe specs heal you
• Blowpipe specs also have double accuracy and double damage

So when you are in a dangerous melee situation, Lightbearer gives you a real escape tool, while Suffering only offers cheap RuneScape gold small passive bonuses that the guide considers not worth it.

Bottom line
Suffering Ring is skipped because its benefits are too small for this Inferno setup, while Lightbearer directly helps you survive messy melee situations and recover with more specs.