[FireDog]

Fire, not really sure what you're talking about in the first part, but as for Froslass, well, Froslass generally isn't used as a Staller in today's metagame, anyway. Witch Ice being arguably the worst defensive type in the game, and ghost making it weak to Pursuit, Froslass is usually instead used as a Suicide lead, spinblocker, or a fast supporter. For Hail stall, you generally want to use Walrein.

I see where you are coming from...But Froslass can make a great hail stall. Maybe not in Black and White onwards because frankly I have not played them yet. (Getting White soon) ...But this is straight from Smogon and it works wonders for hail stall IMO.

Hail Stall

Name Item Leftovers / BrightPowder

Nature Timid
Moveset
~ Substitute
~ Thunder Wave
~ Spikes
~ Blizzard / Ice Beam / Taunt

Evs: 248 HP / 228 Def / 32 Spe

While Froslass can make a reliable lead, you cannot forget about her ability: Snow Cloak. This set combines Snow Cloak and paralysis to cause plenty of stress for your opponent. For example, with the opposing Pokemon paralyzed and hail falling, Froslass will only be hit by a 100% accuracy move 60% of the time. If you can confuse the opponent, either through Froslass running Confuse Ray or some other means, then that brings the chance down to 30%, allowing Froslass to either set up Spikes or attack with her STAB move with near impunity.

Substitute allows you to stall until the opposing Pokemon misses an attack. Thunder Wave slows down the opponent so Froslass can set up a Substitute before it can move and can prevent the opponent from attacking. It also prevents opposing Pokemon who try to use stat up moves from sweeping due to their lower Speed. While Froslass has a Substitute up, she can set up Spikes, which, alongside hail, slowly wear down the enemy. The last slot is for either attacking or more utility if you feel it is necessary. Blizzard takes advantage of the hail due to the accuracy boost it receives. Ice Beam is there for the extra PP and accuracy outside of hail, but is weaker. Taunt is an interesting choice on Froslass, as it prevents opponents from setting up, such as opposing Calm Minders. It also prevents Forretress and Skarmory from setting up entry hazards but prevents Froslass from dealing any damage.


Finally, while Ice is by far one of the weaker types defensibly, I would like to remind you that the notable Ice types that are usually used for strong teams are Froslass (Large variety of options), Wevile, and Mamoswine(Both phyiscal powerhouses). Along with others if used correctly, although those three seem to stand out the most to me.