I can see that but they also recomend getting to the hit cap prior to getting to spell pen "cap".

Looking at the elitisjerks website however strength is actually more valuable than hit even before being capped. I realise EJ is a PvE website, but as such there is actually some fairly detailed calculations behind their recommendations as opposed to what I can see on AJ.

The same article recommending the spell pen also refers to vicious gladiator as viscous gladiator :P

Honestly, I don't know for sure, I am just throwing the possibility out there for consideration that considering it is such an annoying stat to gem for, it would be nice to quantify if it is actually worth it.