You can do that

/ja Boost <me> <wait 11>
/ja Boost <me> <wait 11>
/ja Boost <me> <wait 11>
/ja Boost <me> <wait 11>
/ja Boost <me> <wait 11>

etc, the only problem is it'll cancel if you click another macro.

As for anything else, they already said No previously as it'd be too much like a bot.