Rate these guys and fill in the spaces?

[Satan'sLittleHelper]

This is going to be my first team with EV training. Its pretty standard and boring so far. I have four pokemon but am not sure what role the last two should play and what they should be like. Here's what I have so far...

Espeon - Timid
EVs: +SA, +SPD
Calm Mind
Baton Pass
Psychic
Morning Sun

Milotic - Modest, Leftovers
EVs: +SD, +DEF
Surf
Ice Beam
Toxic
Recover

Skarmory - Impish, Chesto Berry
EVs: +DEF, +SPD
Drill Peck
Roar
Spikes
Rest

Slaking - Naughty
EVs: +ATK, +SPD
Hyper Beam
Shadow Ball
Earthquake
Fire Blast


Not sure about items for Espeon and Slaking (still don't know what all the berries do :\ )
Since I have all these OU mon suggestions for UUs that would work well would be cool.
thanks

 

[Frostweaver]

there are only a few berries that you should know

petaya berry- boosts sp.atk by 1 lvl when hp is below 25%
liechi berry- boosts atk by 1 lvl when hp is below 25%
salac berry- boosts speed by 1 lvl when hp is below 25%
lum berry- heals any abnomalities

Espeon- I dunno... I dislike Espeon as calm mind baton passer. I'll rather use Mr. Mime as Mr. Mime got soundproof too.

Milotic- definitely needs hp, def, sp.atk and sp.def for EVs.

Skarmory- fair enough... though I'll rather take off a bit of def for hp

Slaking- fire blast should be brick break. It can still hit skarmory, and the brute force is strong enough. Also I'll personally use adamant to boost attack power instead, but that's just personal preference.