I always wanted a sister tool to the buff hammer much like how chem and spanner are to their counters.
But i am afraid i must disagree with your topic for the current buff hammer.
The biggest thing that you may be ignoring a bit is the choice of the buff hammer on an engineers loadout. Whenever you choose a buff hammer as an engineer, you sacrifice your effectiveness on repairing/safety ALWAYS.
Spanner Mallet Buff =/= Fire annoyance
Wrench Buff Anti-Fire =/= Poor Repairing management
The wrench sucks at saving components, and mostly sucks at saving the engineers time at repairing things. The baloon, Main engine, some ship hulls at most. But any engineer with buff hammer greatly pleases the pilot. Even if it changes a little, like the hull buff on the squid.
Now, the buff hammer instantly places the engineer at a more active spot, depending on his role. Either actively repairing, or gun engineering. While a full on repair engineer is more proactive, and reacts to damages and is then active. So you have 1 completely different engineers, and a gunner ofc. Or 3 engineers if you think a gunner is not worth it.
However you place that buff hammer engineer is up to you. On a gun, buffing the gun to better do damage. Or, buffing other parts yett trying to actively repair.
The best kind of buff engineer i came across is, my self. :|
One that runs around buffing guns and engines, baloon hull everything, and not gunning while maintaining some damage, while the main engineer loadout runs to repair extensively when in heavy disable or repairs.
The mallet repairs so much and makes the engineers job much easier in comparison to a wrench.
The baloon, Main engine, some ship hulls at most. Is not repaired quickest with wrench.
A single tick of baloon health is repaired with wrench, while 2 and a half ticks are repaired with the mallet. Making the baloon more accesible to use quicker so the ship can actualy go up and down. The mallet also punches wrench in the face with nullifying chutevent/Hydro most.
A Buff engineer with mallet spanner Buff must annoy the other engineer with extinguisher to extinguish flame, ultimately taking away time and fires being a neusance constantly. In the end, it is also a worthwhile combination of all things.
Allright, to conclude. You will always Have 2 engineers atleast because their number+Roles do make a diffrence. And are different from each other. If there would be no Buff hammer, the engineer diffrence, would be next to none and the wrench only being used by the gunner and pilot exclusively. That is why the buff hammer is so good, but even as it is has its way of making it not so good. And that is the timer on each buff. Gun buffs are made to be short on purpose, engine buffs are easy to buff on purpose, hull is difficult to buff on purpose etc etc. Giving a different way of wasting the engineers time.
If you see 2 buff hammers on a ship, the repair rate of that shipp is going to be poor in comparison versus one ship that has atleast one spanner mallet with extinguisher engineer.