You're using RI to cover your aoe snaring against a priest or paladin.
Chilblains is removed on disease dispel, so if a holy paladin is dispelling frost fever on your target to remove the snare, you get 20 more runic power and double the damage to reapply that snare by using HB again.
I'm already global capped as frost so the free runes wouldnt be that big of a deal unless youre being kited.
I just cant see it being useful, if you need to peel someone vs a pally/priest or theyre spam dispelling and W-keying away but you want to catch them just use chains
1 min strang with the potential for 7 second duration is borderline unfair if youve ever played with a competent warrior post patch, we took down a max geared bauble gladiator holy paladin in about 12 seconds of uptime including the time he was in bubble, pre resil nerf, and with a 10% bonus to his healing since it wasnt in actual arena (nagrand)
Itll be more absurd with collosus smash being implemented, the shit warriors + dks do to people post patch is basically unfair, the only thing gayer atm would be warrior + feral but thats because feral is COMPLETELY overpowered atm, I have faith in blizzard that that shit wont last but you never know
Theres literally no time or reason for people to be dispelling vs TSG, we have chains as a backup snare if it gets out of hand, even playing with a warlock I see frost being dominant for shadowcleave since it can actually cleave and not the 500 dps bullshit they call our amazing unholy diseases, comes with an off DR CC that basically forces a trinket, and UA covers our chillblains snare vs the almighty paladin (unless they use cleanse, but even then they apparenrtly just want to oom themselves faster which will most likely be the entire purpose of scleave in s9)
I think people are underestimating strang as well, pre patch only druids got royally fucked by it in terms of duration thanks to talents, but with shit like hunters turretting the entire team with readiness silence shots, base talent reductions etc, strang was only really a 2-4 second silence + interrupt most of the time. Sharing a 1 minute CD with HC can lead to a solo ~20 second interrupt + blanket lockout on a healer every 2 minutes. The only one thats tricky is shaman since you cant chains/deathcoil groundings down as easily, but honestly I might just mindfreeze my target + focus strang into grip HC and get a trinket or a kill 100% of the time, god forbid you chain it with a fear chain or cyclone chain, bash, deathcoil etc etc.