Need Help With A Range Tank

Okay.
I'm making a new Range Tanker and im looking for someone to help me. Like tell me some things so I dont mess up the stats.
I was out looking of the fourms and found this.

"99 Defence
99 Ranged
99 HP
1 Prayer
1 Summoning
40 Attack
99 Strength
XX Mage (Any level you want)

NOTE that the top 3 are what make combat level 97, ONLY. 40 Attack and 99 Strength will NOT raise the combat level, in fact, if 99 Ranged didnt exist, it would only be level 94.

COMBAT LEVEL - 97

With 43 Prayer - Combat level - 102"

If anyone could help me out what he means pretty much.
My stats are 40 Defence and 70 Range and thats it besides hp everything else is 1
I want to get prayer up but I dont know if that will ruin it also.
The reason want to get prayer is to get fire cape.
I want to work on other things like magic but I dont want to get my combat levels up. So if someone could please help me out and help me out on what that part I put in "" "". Do I have to get 99 hp defence and range until I can train mage? Cause I want to to train mage but dont want combat levels to go up. Also I want to train prayer. But I don know if that will ruin the account. I want to do animal magnatism but a requirement for it (restless ghost) gives you prayer exp.
If someone could help me out ASAP I would really appreciate it.