You will not receive totem pieces or ancient shards if you are using a cannon as cannons cannot be placed in the catacombs.
You can check the boosts for a specific monster and by how much by using the
Truecommand. The Elysian spirit shield will also reduce your food usage by 17.5%, this needs to be equipped to work. Having a full Justiciar set equipped in your melee will further increase your food reduction by 6.5% on any Melee tasks
Cannon boosts a number of bosses by a variable amount, the same applies for bursting and barraging.
Please note this is not complete - either submit a PR or post in the wiki channel on discord if you notice something is missing.
* Better boost(s) available.