ok heres my turn .
I Play Sro since 2005-06 and the best build that i have ever played with that pwned everything in PVP was Pure STR bow Force / Fire / light and that was before the 110 GAP as of now if you want to build this i suggest you to do FORCE/FIRE with no Light .
also if you just want to be invincible and deal low damage i will suggest Glaviest/Blader/fire Pure str.,<---- rare build ( a friend of mine had it with full set +7

i saw 4 vs him and he didnt die

when it was gap80 ) he used to tank yarkan by himself while he was LVL80 !!!! when he lures it he gets the kill when a nuker comes he gets KSed ( Disadvantage you level slow :/)
if you want to deal huge damages but weak in defence :Wizard/cleric pure int even though i hate this build

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What i have ?
Pure int S/S fire light , All i need is full set +8/9 with SON and ill pwn everything

( already have the sword +7 SON)