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Check my reply to another post below. You still have that xmx512mb java entry. Which is probably a system variable which overrides any other memory option.
http://forum.feed-the-beast.com/threads/running-out-of-memory.160456/#post-1692443
Check that you don't have that setting in as a system variable in windows as that will override any other setting for memory allocation. Use the link below to check.
https://java.com/en/download/help/path.xml
Fluids cows can spawn in normal biomes but spawn better in ocean or deep ocean biomes. Also it maybe because of a cap limit on spawns. I have an area which is deep ocean and all that spawns are fluid cows.
The only servos in the pack are from Thermal Expansion so why would you add a stack upgrade to it. The stack upgrades are for use in transfer nodes from Extra Utils.
It probably crashes because the draconic chest is not like a normal chest because, I believe, it acts like a furnace for smelting items.
In future if you are going to ask for help in any forum don't be rude to people that may be trying to help you as this will get you nothing.