you also get nice xp

So what is the relationship between the idol and your war rank? If I am rank 1 and then grad the idol I go to rank 2 straight away? Then does it have any further effect on the war rank after this? If not maybe it would be better to let the enemy take it, then grab it straight back and jump straight to the next war rank.

I think the idol increases your normal war rank by one, so if you have rank 1 and get the idol, you go to rank 2.  If your enemy captures it from you, you go back down to rank 1.  So, whoever owns it gets more/better creeps.

I think rank 10 is the same as rank 9 but more creeps come at once.

that is good to know, so i can give it to the ai (i always wonderd why the games are so easy)

4 giants instead of 2 is a huge difference.

On that subject though, i really wish it went from 4 to 8. (2 from each portal, then 4 from each portal.)  No 2 to 4.

If you got 4 Giants from one portal, then capturing the enemy portal by their base might actually be a big deal and be something you could do to come back.

Or Giants need to have twice the health and like 50% more damage.

THough that's balancing stuff, and not what this build is about.