As long as your partners bank account is generally in credit from month to month and he has suitable accommodation for you all, there is no fixed amount of savings that is required, it's just the more savings he has, the better it looks to the Entry Clearance Officer who will make the decision.
I would have thought that you would have a stronger case if you got married in the Philippines first and then apply for a spouse visa, as it's quite rare for a spouse visa to be refused. As long as on paper it looks like your partner can support you without claiming any extra money from the state, I think you would be OK.
Iain.