Totem Forging Nerf

[Venom]

Maximum flexibility reduced but should still give the same results

@james

Made changes to forging balance to take into account the introduction of special material gear:

• Reworked item flexibility so that values can go up to 150, to allow the new more powerful gear to have lower values.
• Rebalanced existing gear values so that the resulting effectiveness is almost identical to what they currently are given the same Intelligence and Power, but may vary slightly in some cases due to the way the maths works.