Reset inactivity timer when an attack is blocked

[Malong]

I know how long the timer for AFKing is.  And I have not seen a wave take that long, except for toming because of wiping, in over a year.  This was carefully thought out well before it was put in. 

You say that it was well thought out, but the timer has already been changed since it was implemented as mentioned below. It seems you are not entertaining the possibility that the system is imperfect, when the fact that it has been adjusted once would say otherwise.

Adjustments to the timers have been made since 1.0.0 was first released after there were some initial problems with shielders being marked inactive too quickly.

Waves that you don't get a shield crack during are not going to be long enough to cause any issues.

I've addressed that previously here:

Anyways, yes, shields are repaired when they're cracked, there are still waves where the shield is not cracked at all, so no repair is necessary and thus, during the next wave, the players in the shield wall will be considered inactive if they did not have the opportunity to kill remaining ranged bots, which is quite frequent considering everyone goes out at the end of waves. Are we to say "don't help them, save those bots or they'll be inactive?" Are we to then presume that everyone would coordinate and follow these directives?

There is no reasonable excuse to not do anything in the amount of time it takes the game to count you as AFK.  NONE.  Only time where it MIGHT get thin is the waves that you HAVE to repair shields if you hope to not die during it.

Again, you are the first and only person to bring up AFKing. The root issue is considering active and contributing players as inactive as an unintended consequence.

Either way, the aforementioned posts are not excuses, these are reasons and sequences of events. The following has happened multiple times:

A shielder dies on some wave between 17-19
Wave 19 is cleaned up
Tome is used for wave 20, without the full preparation timer left
There is not enough time to repair the shield before the wave reaches the shield wall
Said shielder doesn't get XP for wave 20
Said shielder starts slashing between shielding
Said shielder dies and the wave breaches through
Everything but Odin is cleaned up
Tome happens
There is no "wait for all the resurrected players to use a health or anvil prop"
Odin dies, and said players do not receive XP