OK, here is the absolute best advice I can give you.
- Find an army that is "your" favourite. Pretty much any army can get to Champs. I've seen Barch, Hogs, Loons/Mins, GoWiWi etc etc.
- Be patient and do not force it. Take your time to pick the right base and use the 30 seconds to fully analyse it each time before starting. (ie: If you're barching keep an eye on Mortars / Wizard Towers. If you're looning then try to find central ADs. If you're GoWiWing then just attack anything :))
- Always make sure you have full army, full spells and both heroes. Once you get to Champs then you can skimp on the missing spells / heroes etc, but getting there you should have everything just in case.
- It could be a slow journey so you really need time. Are you able to dedicate 4 to 6 hours an evening for a few days straight? The trick is playing a session of 4 to 5 battles and winning 40 to 60 trophies. This will then be enough to cover any you lose in defense so you'll be making progress.
- I found that I would raid in the evening, then log off and instantly get my 12 or 16 hour shield. This would not be long enough to last until I was able to play the next evening so would mean that my base would be attacked again during the day. Because of this I always tried to do 1 raid during the day (ie: break the shield, do 1 raid for 8 to 10 trophies, then logoff and get attack). The plan is that the trophies you quickly make here will soften the damage from the second attack. You'll then get another shield to last you until the evening.
- I'd say boosting Spell Factory is a must. Boosting Heroes is a maybe and boosting barracks should be rare. Reason being that you're waiting for spells to be made so you don't need an army that quickly.
- If you lose a battle, force yourself to watch it back a couple of times and learn from it. If you still don't know why you lost then avoid that base design, there's plenty of others out there.
- Most important: FORGET FARMING. You will be offered some crazy bases with 600k / 600k / 6k. They will be worth 1 trophy if you win and -39 if you lose. Should you get greedy here and lose it could set you back a day! ONLY attack bases with 20+ trophies on offer. Plus, the more available the less you lose should things go wrong.
Good luck!

