People did one or the other and both methods seemed to work.
Instructions say to send as much as possible from date of marriage to date of I-751 filing.
The most important things:
1) Keep it consistent. If sending monthly, send every month, don't skip months. If sending quarterly, don't skip quarters.
2) Do not redact statements. Don't blur out amounts, names, addresses, charges etc.
3) Send ALL statement pages .
Sometimes people get lucky sending redacted or incomplete evidence. If you don't want potential RFE, just follow advice from the points above.