The work is judgement, but most of the hours go on getting ready to make it: pulling papers together, drafting the same letters, chasing clients for things they were already asked for twice. That is the part that can go.
Engagement letters, checks and the client record all produced from one conversation.
Accounts, contracts and correspondence read, summarised and cross-checked before a fee earner opens them, so they start with a view, and the detail underneath it.
Drafted from live numbers in the practice's own voice, so the job becomes checking it.
If your partners spend their billable hours getting ready to advise, this is the one. We would still start by watching your team do it, because every business does this slightly differently and the difference is where the time goes.