Say I want to climb onto a ledge to kick a flaming brazier on the surrounding cultists. That's one action to move to the ledge, one action to stow my shield and another to stow my sword. Then another action for every 5 ft I want to climb (assuming I make the check). Then another action to move to the brazier. An athletics check to push the brazier, and if I succeed, the cultists below are subject to a 15 ft cone attack. The save DC will be ridiculously low because the brazier is a low-level hazard.
That’s a lot of checks for very little damage.
Actually, it’s just one two checks, one to climb and one to kick. Plus this is the worst possible character to try this action — a shield-bearing fighter who has bad athletics and has taken no useful movement feats.
For a more reasonable situation, I’ll use my actual 5th level Tengu fighter. They have the combat climber feat and fight with a bastard sword, so, if they start by the wall they just climb up 5’ per action (I cannot fail and have a 50% chance of climbing 10’ with a critical success, assuming this is a fairly normal DC 15 wall). I will assume the brazier is by the edge, because my GM is not a dick, and so again I cannot fail the DC10 or 15 action to push the brazier. So a reasonable case is 2-3 actions to get up the wall (1-2 actions depending if I hit the critical success) and one to push the brazier.
I actually also have a 5th level monk, who climbs 10-15 feet in an action, so even easier for them.
The big question is how much damage the brazier does. I don’t know of a specific “knock over a brazier on a group of people” action, so I’d just use the general damage table, using the complex (low damage) column since it’s an attack on multiple people. So at my level, a 2d8+7 with a save DC for them of 26.
Assuming I hit three targets, that’s probably one save being made only, so 40 total points of damage. For straight hitting, I’ll almost certainly hit once for 2d12+4 and have a 50-50 chance of a second hit for 2d8+4, so … math … about 20 points of damage. It’s probably worth doing the brazier thing if I can catch 2 people in it.
Now, I probably do actually need to move to the edge of the ledge, so my first few rounds could be:
- attack a single target twice, move to edge with third action
- climb twice (assuming a bad roll) and push brazier off
- walk of edge and fall (if I wasn’t a monk or tengu I’d jump down), attack twice.
I’m pretty sure I’ve actually done this in an AP, actually.