Skarmory or Ferrothorn as a hazard setter in Gen 5 OU?

Question

Pros/cons or what teams they are recommended for.

Comments

Skarmory and Ferrothorn are both useful in different situations, so I think the answer to this question depends too much on your specific team. You can post your full movesets and then ask the question again here: https://pokemondb.net/pokebase/rmt/ask

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I think this question could work in the Pokebase section if it was edited to "What are the pros and cons of Skarmory vs Ferrothorn as Hazard Setters in Gen 5 OU?".

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Will edit the question as per Cdijk16's comment -- if you want team-specific advice, head over to https://pokemondb.net/pokebase/rmt/ask

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I am just not sure what to pick and this is for singles

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these are the move sets I plan for gen 5 OU
skarmory
ability sturdy
item leftovers
stealth rock
taunt
roost
brave bird

ferrothorn
ability iron barbs
item leftovers
stealth rock
spikes
leech seed
power whip