By that standards, the pliers are also most effective in the frontlines where there's plenty of fresh corpses.
Plus nobody said the arkenhammer needs to be attunned to your ruler. If anything, Stanley started his dwagon fleet farming when he was but a simple Warlord.
And if anything we've seen sooner or later every ruler in Erfworld ends up staring at the wrong end of a weapon, even super-paranoid Charlie in his fortress almost got shot down by a prisioner, so if anything a ruler being able to fight their way out of an ambush is a pretty nice thing to have.
I would actually say this would be the best time to awaken the arkenhammer's hidden powers.
Because before GK was the only side with two arkentools. Wanda with her decrypted army plus a dwagon fleet backing her up already was plenty OP. A good chunk of the story was finding ways to get the Wanda+pliers combo out of the picture. GK didn't really need another massive power upgrade. There was that time Charlie was revealed to have guns, but those were looted and now like half the main sides have guns of their own.
But if now Wanda now joins another side and takes the pliers with her, I believe it's just the perfect time for Stanley and Hamster to get started with HAMMER TIME BABY!