I would like to direct your eyes to the long discussion between Boret and I on his similar card idea (
http://elementscommunity.org/forum/index.php/topic,17373.0.html). We developed a means to balance that idea that is applicable to this idea. The discussion takes place on pages 1 and 2.
The idea was that the Summation of the Ratio (Bank Net quanta/Time Factory Quant) should equal 1 over the span of an average game.
The table below uses the current unupped version of Bank but modified with only 1 investment per turn to show how it compares with this test. If the average span of a game with this card is 7 then it is balanced. I do not believe this is the case.
| Turn | Investment | Total Quanta Produced | Total Quanta Cost | Net Quanta | Total Quanta from Time Factory | Delta | Ratio |
| +0 | 0 | 0 | 1 | -1 | 1 | -2 | -100% |
| +1 | 1 | 1 | 3 | -2 | 2 | -4 | -100% |
| +2 | 2 | 3 | 5 | -2 | 3 | -5 | -66.7% |
| +3 | 3 | 6 | 7 | -1 | 4 | -5 | -25.0% |
| +4 | 4 | 10 | 9 | 1 | 5 | -4 | 20.0% |
| +5 | 5 | 15 | 11 | 4 | 6 | -2 | 66.7% |
| +6 | 6 | 21 | 13 | 8 | 7 | 1 | 114% |
| +7 | 7 | 28 | 15 | 13 | 8 | 5 | 163% |
| +8 | 8 | 36 | 17 | 19 | 9 | 10 | 211% |
