Its just not that simple. Each case depends on the individual circumstances e.g. how long married, earning capacity of both, financial circumstances of both, future prospects, whether either party may have made significant life changes to accomodate other, whether either wants their day out in court, whether either has grossly inflated notions of what they want - happens all the time, etc.,etc. So unfortunately, either you sort it out or it could end up in Court. Is mediation a possibility? Only works if both willing.
If not, then it might be worth considering starting the Legal Separation process yourself rather than waiting for your wife - who may or may not take any steps for some time. In the meantime, there will be no resolution, you will both be stuck with the mortgage on the house etc.,etc.
Always tough but tougher still unless both parties are entirely reconciled to the end of the relationship and can see beyond the pain of separating.
mf