Alexstrasza is interesting hero concept but only on paper. She is healing based on percentage HP which is equally good and bad.
Lets start with her Q (gift of life): Alexstrasza sacrifices 15% of her current HP to heal for 150% of used value - not only it is uselesss when Alexstrasza has been damaged to lets 50% above - it only counters her next heal and so on, and additional 150% regen is not enough to pay for it. Imagine if Lily healing brew would heal for 50% more but after using it her max movement speed can’t exceed 80% for 2 seconds. I can guarantee such trade would lower her win ratio by like 10% because this ability wouldn’t work well with her trait. My idea to fix - It should heal 5% of target max HP + 100% out of 10% of current HP that Alexstrasza used + 100HP (x1.04 per level) and Alexstrasza should be able to cast it on herself. Additionally, passive of this talent, should be that all restoration effect - both mana and health by 25% on Alexstrasza (it would be better than 12 HP per second more on lvl 20). That way we would mitigate first problem of Alex - lack of survivability.
Next is her W (Abundance) - you create circle restoring 20% of HP after 2 seconds. Seriously? It has some escape value but it shows enemy where to place skills and actually is countered by like 2/3rd of heroes in one way or another (either by doing good AoE dmg countering usefulness of heal or by displacing and technically more if using ultimates). Suggestion how to fix it - Abundance should pulse 3 times (on 0 - initial, 1 and 2 second mark) each pulse healing 5% of max HP + (75x1.04 per level). That way most of character wouldn’t be able to completely nullify its effect (and let’s be honest - considering how much characters can abuse it - it is disgrace).
Moving on to E (Flame Buffet) - it is generally OK skill but I find cost of 50 mp (without talent) way to high for medicore CC and low dmg that is not instant (you need 2nd attack) and let the enemy move - you rarely have time to cast it 2nd time after miss unless you have godly aim and reaction speed just not to waste another 50 mp. Also it’s DOT is one of the worst (lvl 1 being 7 dmg per tick) beaten only by Nazeebo Voodoo ritual dmg (until level 20 i.e. which most of people chooses Vile infection to boost dmg by 150%). While I don’t have general issue with Skill I think little boost like increasing dmg to 96 over 7 second would be good and reduce it’s mana cost to 40 - it would help Alexstrasza with mana management and deal minor increase in DMG.
Ultimate and trait is OK and I don’t see problem with them.
Talents:
Live and Let Live, Exuberance, Life Blossom, Tough Love depends on Alexstrasza current HP percentage. Earlier suggested buffs would make mentioned talents at least little bit more useful. since Alexstrasza will be better at maintaining her own HP on good level. Circle of Life and Surge of Vitality should connect with earlier mentioned buff. On first reward Circle of Life should increase healing value per pulse by 2% of max HP (instead 5% after 2 seconds) and Surge of Vitality should grant 25% movement speed for 2 seconds stacking up to 3 times (person that was whole duration would have 25% movement speed for 4 seconds instead 30% for 3 seconds). Since Mana amount is already covered by buff, Flames of Fury utility should be change to something like more DMG, giving Alexstrasza some extra bite - lets say increase DoT duration and DoT DMG by 25%. Finally one more talent I have problem with - Blessing of the Red. Heroes gain one time + 500 Hp. While it appears to be nice from level 1 PoV on lvl 20 or higher it loses it’s charm as it is simple difference of 2 basic attacks / skill shots (even less than 1 for some characters). While I can agree that obtaining usual value of bonus being 4% per would be bit to much (resulting in 1096 hp bonus on lvl 20), I think 2.5% bonus per level would be reasonable (819 HP on lvl 20).
Hope these are OK and not to busted. I like Alex but seeing her struggling compared to other healers if she goes for DMG build or lacking offensive if she goes for healing build makes me sad.