Crunch: 80 x 2 for SE damage=160
Outrage: 120 base power x 1.5 for STAB=180
A neutral STAB move is often as powerful, if not more powerful, than a super effective move without STAB.
Froslass simply isn't a bulky Pokemon and shouldn't try to be. Setup moves (SR, spikes, etc...) are generally a waste of time in the tower since the AI rarely switches. Finally, it's basically a poor man's Starmie on this team.
Ice type is a great offensive type ,but a shitty defensive type to have due to it's several weaknesses.
What you need is someone who can cover Starmie's Dark and Bug type weakness, and Garchomp's Dragon weakness.
This makes Scizor an ideal partner as it's perfect synergy with Chomp and Starmie
This is what I used in my 100+ streak:
Scizor w/ Leftovers
Technician
Adamant
252 HP/252 atk/6 DEF
- Substitute
- Swords Dance
- Bullet Punch
- Aerial Ace/Brick Break
Sub protects you from status and OHKOs. Bullet Punch gives you priority, and Aerial Ace knocks double teamers around. Both moves get a Technician.
Brick Break doesn't, but it's Scizor's only option against Steel types like Magnezone and Heatran.
Bug Bite is also a viable option if you want to utilize his Bug typing.