http://www.allodsbase.com/calc#a60x2k7u ... 2oi4runlc2
This is the build I'm currently running in a4 and I have tested it without dynamo effect rubies and I've been doing just fine on mana considering I'm using an epic a4 dagger (Too lazy to do WH for leggy staff). However, Venom is wrong on the intelligence gain does make a huge difference. I played around with my stats a little bit and dropped my luck to around 780 and pumped my int to 900 and I've noticed a huge difference in DPS. My comets were hitting for 500k before whereas now I've been hitting close to 800k without trinket procs. I took it off during an allod just to test. As for mana issues, I don't see how under geared players will have any problem as I'm sitting at 25k mana with an epic a4 dagger and I'm sure the cradle rep staff gives the same if not more faith.
I dumped my 3 extra rubies in positive feedback however I feel like dropping them. I'm still debating on whether to throw my extra rubies into corona discharge or the flash rubies as corona discharge seems like a good troll skill to kill under geared players who feels the need to attack me during WH.
Still curious to whether anyone has tested positive feedback extensively. I've ran with and without the rubies and I haven't noticed too big of a difference. Normally my stats are as follows: 800luck/850ish int (don't remember the exact number)/657wis/722perc and this is with a luck elixir and int alc pot. Luck is enough for me to crit 75% of the time, but the damage increase from positive feedback seems to be negligible.