Considering that this crature has only 1 attack and 5 defence, putting adrenaline aside since it can get lobo'd;
it is still relatively weak compared to archangel which has 7/7 and can mend 5 hps on a single creature.
I'd say this card is essentially the opposite of Archangel.
having weak attack but good range of healing, while Archangel has mid-high attack and limited healing range.
However, this costs 5 while archangel costs 6.
So in terms of overall balance between cost and ability values, Archangel actually overshadows this.
Archangel: 6 cost for 7/7 stats + singular healing of 5hp for 1
.
total stats-heal and cost calculation ratio 14: 2.8/2:7 = 14:1.4: 7
Life Sage: 5 cost for 1/5 stats + all range healing of 3hp for 2
. total stats-heal and cost calculation ratio
6: 2: 7
conclusion:
Archangel has 14 stat points and average healing potential of 1.4 (2.8 divided by 2 because of singular target healing) for an average ratio cost of 7
while Life sage has 6 stat points and average healing potential of 2.0 (not divided because of all range healing) for an average cost range of 7
So essentially, Archangel greatly overshadows this for basically the same price ratio.
Therefore, this card should either remain as it is or lower its cost by one. having adrenaline is fine because it has a chance to counter itself (fire shield, carapace) and it can get lobo'd.
formula used:
Archangel : sum of attack and hp : (sum of atk and hp / total hp heal) / 2 : sum of card cost and ability cost
Life sage: sum of attack and hp : sum of atk and hp / total hp heal : sum of card cost and ability cost