Ok.
Some of the effects cause healing.
70% of the un-upped effects cause some sort of healing
65% of the upped effects cause some sort of healing
Of what is left, the effect is split between drawing a card and summoning a creature.
If what you need is healing, then the other 30|35 % of the effects are worthless.
Thus, if you need healing, and not a card, and not a creature, the average would be done with the healing effects at normal value, and the other effects at a cost of 0 (because they give no utility)
The same can be done with drawing a card and summoning a creature.
Your average is only valid if the user of the card, and any point in time, sees equal utility for every option.