Some new(proposed) swap sigils have 18sec cooldown.
I agree that some of these sigils are too strong for warriors to gain every 10 sec because Fast hands.
But giving them 18 sec cooldown will result into a 32sec cooldown for warriors at the worst situation.
If warrior:
sigil active > swap 8s > swap 8s (sigil still on cooldown) > swap 8s > swap 8s (sigil active> result 32s
sigil active > swap 7s > swap 7s (sigil still on cooldown) > swap 7s > swap 7s (sigil active> result 28s
sigil active > swap 6s > swap 6s (sigil still on cooldown) > swap 6s > swap 6s (sigil active> result 24s
sigil active > swap 5s > swap 5s (sigil still on cooldown) > swap 5s > swap 5s (sigil active> result 20s
Even if a warrior swaps every 5 sec they would still have to wait longer compared to other classes.. but most warriors will not swap every 5 sec.. its more around 6 – 7 sec.
Conslusion: Do not use these sigils on warriors with fast hands.