My main powerhouse is Torterra, who is basically designed for long, drawn-out battles. Octillery is for quick challenges versus wild pokemon or weaker trainers, as is my Pidgeot. Pinsir is a powerful all-rounder, and Zangoose is for attacking enemies with low defence or speed with fast, powerful moves.
Like I said, Titan is for dealing with long, drawn out battles. Earthquake deals with anyone who isnt a flying type, and Stone Edge is good for impaling anyone else. Solarbeam is for battles against rock, ground or water types who are slower than Titan (not very many) and Leaf Storm is helpful for smashing in anybody. The held white herb is useful for nullifying the status change, meaning leaf storm is just like any normal, extremely powerful move.
Octillery is my fave Pokemon, and as well as being a tough all-rounder, I mostly pair him with Pidgeotto in a double battle so he can use surf without harming my birdie.
Your Torterra has it's weak and storng points some of the weak points being low pp moves with low accuracy and Solar Beam gives a free move to your foe, though I see a some what good combo being Leaf Storm can be used and Earthquake and Stone Edge dont get weaked, you dont even need White Herb I would advise replacing Solar Beam with Swords Dance since it has a higher base attk but that bold narture, get a differant one you want all the attk it can get. Octillery's moves seem good and go with the narture snice they are all Sp. attk execpt Bullet Seed which has a base damage of 30-50 and the Incense has to go. Now for Electivire good nature, bad held item, and what's this all elec type moves? Thunder? aatk being higher then Sp. attk(again)? Not much i can say about the Pigeot execpt that the Nature's +spd is good but the -attk not so good. Pinser's moves are good execpt Guillotine it can OHKO a pokemon IF IT HITS! It almost never hits in those 5 pp's it has, and an Amulet Coin? DON'T use it if you are going to do battles against a real person. Overall the team looks like plain sweepers and nothing else.
See Pkmn.net's competitive battling section.
Quick sum:
Solarbeam goes. Leaf Storm goes. Replace with Wood Hammer. Replace with Synthesis/Leech Seed.
What would happen if someone came at Electivire with a Ground-type?
Octillery's OK.
Clawface had better be for fun! :P Forgive me... but it stinks.
Never ever have Guillotine.
Eagleye is all wrong.
The items and natures are wrong.
All your pokemon are strong, but Electivire will be defeated easily from ground types. Teach it at least another attack or something. Also, give your Pinsir an item that actually helps its moves to win. You can't just rely on Guillotine.