Custom Deck Play
Limits
200 Points limit | No Card Limit | Duplicates cost more than singles
Custimize and play.
The Formula ? ? The rules/limitations for customizing your own Number War deck are based on a “deck points” allotment. There is a base  amount of useable deck points (200), and then a cost-per-card  based on the card’s rank (2- 10, A, J, etc.), with any duplicates  costing more than a single of each card rank.
Royals
Jacks =10pts Queens = 4pts 
Kings = 8pts  Ace = 10pts
Base card costs
Numbers
2 = 2pts 3 = 3pts 
 8 = 8pts   9 = 9pts
4 = 4pts 5 = 5pts 
6 = 6pts 7 = 7pts 
10 = 10pts
Breakdown
(Same as face value)
The formula is a base cost for each unique single determined by  rank. The cost for each duplicate simply goes up by the base amount  and the total is added to the base.   So if a single costs 10, then the first duplicate will cost an  additional 20 and the next duplicate 30 etc. The total of all of them is what it will cost to keep all the duplicates in 1 deck.   Below is an example of what costs of 1-4 duplicates would be for 2s  of any suit, with a base cost of 2:   Card 1 | Card 2 | Card 3 |  Card 4 2pts  +  4pts   +  6pts   +   8pts            Total cost (for 4 twos) =  20 pts