Safest way to play online on 4.84 CFW? PSNpatch or SEN enabler? Blocking domains?

I'm new to the PS3 scene. I have Rebug 4.84.1 REX installed, which contains Cobra v8.01. What is the safest way to play online (with minimal risk of ban)? I shall not be using mods or cheats or anything like that. I do not have an account yet, nor I ever had one. Being able to download game demos and apps like Youtube would be nice too (I've seen that no-PSN patched apps exist as well).

1. PSNpatch or SEN enabler? Or can webMAN-MOD do the same functions?

2. Do they support 4.84 and COBRA...

Safest way to play online on 4.84 CFW? PSNpatch or SEN enabler? Blocking domains?