All Slowbro/Steelix Gym

I've been thinking it would be pretty awesome to have a gym of all Slowbro because it has such amazing type coverage.
- Confusion (especially with STAB) is extremely powerful. I think it's probably the most powerful defensive quick move, if I'm not mistaken.
- Ice Beam hits Dragonite hard and covers Grass weakness, also hitting Flying types (Scyther, etc.) for SE.
- Psychic (the charge move) is pretty tough to dodge, and hits all the Grass/Poison types for SE+STAB.
- Water Pulse is a decent charge move and gets STAB while covering potential weakness to Tyranitar's Dark moves.
A whole gym full of Slowbro would essentially be roulette and attackers would probably need to switch a bunch or else take some serious damage.
Jolteon does well though so perhaps put a Steelix (same CP range too!) in the mix here and there or ideally interlaced.
Steelix with SE/STAB Earthquake devastates Jolteon (all of Jolteon's moves are NVE vs Steelix), forcing a switch for sure. Steelix puts up a good fight against Dragonite too. In fact, probably the best two mons (for me, anyway) to take on Steelix are probably Charizard and Vaporeon, both of which are very sub optimal against Slowbro, essentially forcing another switch back! Umbreon does well against Slowbro but not so great against Steelix given Umbreon's low attack stat and Steelix's high Defense stat.
Blissey/Snorlax aside, I think this is probably one of the toughest gyms one could make, and it's very doable. Everyone should have Slowbro candy after the Valentines day event, and by now probably a few decent IV ones. Onix is less rare than Blissey and Snorlax too so I imagine this is pretty doable so long as people are willing to spend the stardust on these low CP defenders.
Myself, I have one Slowbro at L38.5, another at L36.5, and I'm working on maxing out a DT/Eq Steelix which is currently at L35.5. I have one other teammate who is L38 and actually uses his Slowbro still too, so I usually stack mine in there when I see his! Also, if I'm trying to build up a gym I usually use my Slowbro because it's a solid defender and people love putting their mons above, so the gym fills up quickly.
Anyway, what do you think? Am I missing anything?