You can just calculate it.

For example the exp you get from a 4* as a feeder is:

BASE*(1+(LEVEL-1)/3)

Base for a 4* is what you have there: 1350. So level 10 would be 1350*(1+(10-1)/3) = 5400 exp.

The exp required is calculated with the formula in this thread. Entering 1->10 gives you 2700 exp required, so you have a net gain of 5400-2700-1350=1350exp gained.

You can graph the two formulas for any card type and whatever bonuses are active (50% enhance boost, 0-10% skill boost, 5% type boost, 10% name boost.)

The last level before a 4* goes negative with only 10% skill boost is at level 17 with 47 feeders (worth 9405 exp, you spend 7755 exp in feeders + 1485 from the base 4*) which nets you +165 exp. Level 18 takes 52 feeders and you lose 165 exp.

Max gain for a 4* is at 8, 9, 10, or 11 (all +1650 gain) with 11, 14, 17, and 20 feeders respectively.

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