Well, I've come upon some amazing things that can make your not so ordinary character, almost become as strong as Tobi.
If you have any tips: post here and we can make a huge list.
1. When playing a character that doesn't normally have critical strike: Get the Kusanagi Sword. As quick as possible. There is only 1 of that sword. This will give you your critical strike.
2. To get the Kusanagi Sword you must kill the "Rocks" that are in a tunnel. About half the way, There should be a really thin sword on the ground. It almost just looks like a tiny black line.
3. If you can't use/have a mana shield, I suggest getting the Sword of Destiny. It seems to be a better lifesteal than the Mask of Death. As the mask of death only steals 25% of your damage. I think the sword of destiny steals roughly around 50-70%
4. Sage Art vs Mana Shield. As Kakashi, Sasuke, and Itachi. You have the option of getting your Mangekyou Sharingan, it acts as a mana shield. Personally, I would skip this and just get sage art. Sage art gives over 80 Defence, 2000 Damage, The abillity to see things, and attack faster. Combined with the Sword of Destiny, You won't need a mana shield when you can just HEAL your life with A LOT OF DAMAGE.
5. There are a lot gold coins hidden in the Sand Village. Just wander around, I bet you will find them.
6. If you can't use a mana shield, Get a lot of Cape of Yondaimes and True Kyuubi Powers. This will boost your HP and if you have the Sword Of Destiny, You can always reheal it fast.
7. If you DO have a man Shield. Make sure that you get a lot of mana items, I'm not talking little kyuubi powers and Shukaku powers. I'm talking about whopping 8 tail biju powers and Kyuubi TRUE powers.
If any of you want to share a tip. Post here!