Attack Strategies in Clan Wars!

Spells!

1.Lightning- You can zap away Clan Castle Troops with ease,shove them aside early in the raid before they effect the raid and ruin your 3 star and have you bite the 0 star dust.
2.Rage- Makes your flock of troops into a enraged flock of destruction.
3.Jump- Saves your wall breaker lives. Main draw back is that it's expensive and for higher ranks.
4.Heal - Great for all troops that will be slowed by walls, especially useful for hog attack.
5.Freeze- For higher ranks, expensive. Best use is to Freeze Inferno Towers.

Strategies! 

GoGHWWA - Giant + Healer + Wizards + Wall Breakers + Archers
Use Archers to lure CC troops. Have Healers heal Giants after Air Defense is down, heal Giants in the process of destroying the Air Defense using a heal spell or rush it using rage spell.Drop Healer and spam Wizards behind the giant.
Spells: Use lightning,heal and rage spells,maybe jump?

GoWiWI - Golems + Witches + Wizards + Wall Breakers.
High rank attack!  Take out CC troops,heroes if you can,using Witches to keep them busy, if no use them for raid.  Use Golems to take the damage,while Wizards and maybe Witches clean the base, have Wall Breakers break into the center of the base. Use your heroes to get to the center and take out the TH. This attack is meant for 2 starring and most likely will not 3 star a TH 10.
Spells: Use freeze, rage,and lightning.

GoWiPE - Golems + Wizards + PEKKA + Wall Breakers
Resonable lvl 5 attack, cheaper compared to GoWiWi. Same thing as the GoWiWi pretty much,but treat PEKKA as extra heroes.Also built for 2 stars on TH 10 bases.
Spells: Use freeze, rage,and lightning.

All Dragons
Explains itself.Try to take out Air Defenses and maybe Inferno Towers and it's a rather easy 3 star usually.
Spells: use all rage or some lightning to take out Clan Castle troops or Air Defense.

Balloonian - Balloons + Minions
All air raid.Again,take out Air Defenses and Inferno Towers.Have Minions lure Clan Castle Troops then use lightning to destroy them Make sure Balloons go first then Minions.Barbarian king cannot attack air units.
Spells: rage,maybe freeze or heal spells.

Modified from a Clash Of Clans Builder excerpt.

http://clashofclansbuilder.com/guides/view/1932