There is no need to create multiple different nudges, but they might be useful depending on what you're trying to do.
For example, you may wish to make sure you set aside some savings right after you get paid (e.g. £250), but you also suspect that most months you could save an extra £100 but that varies each month based on your spending.
In this case you could:
1. Create a pay-day nudge that notifies you as soon as you get paid with a me2me transfer link to transfer £250 into your various Marygold Money Pools
2. Also create an excess-balance nudge which will let you know how much was left in your account just prior to payment, and let you decide whether to transfer 0-100% of this 'excess' to savings.