We do not use a service provider for anything other than the mechanical action of voting - we assess and decide on the merits of each issue before the meeting
It is worth noting that effective engagement needs to be undertaken well before an issue is put to proxies: by that time the issues are generally decided and it is too late to exercise any influence other than by voting against something, which generally feels good but often doesn't achieve very much. The most effective form of engagement is communicating expectations around the issues facing a particular company well in advance of a vote being taken, which is what we try to do.
In our market, the most common resolutions put to company meetings are regarding voting on directors and remuneration matters