I am an experienced player on Moba (Dota, Dota II, LoL, HoN, HoS) since I play Starcraft I in high lvl & on most of the games in which I move.

Heroes Of The Storm on, I have over 700 games played and I mostly play as a team, where at least I try.

I also have a youtube channel with several video concept, dedicated to Heroes Of The Storm

https://www.youtube.com/HoSFrance
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When I play Abathur, I mainly use these two builds. The difference between the two builds is that one focuses on early / mid game while the other doesn't, and focuses on late game. I only use the first build on Blackheart's Bay, Dragon Shire & Haunted Mines since they are more early to mid game oriented.

My strategy is to upgrade the "Eradicate Minions" spell as much as I can in early game. I think its name is quite explicit : my goal is to kill minions as quickly as possible so I can push the lanes and control objectives faster. After that, don't forget to pick "Regenerative Microbes", which will help your allies a lot during fights. Use your ult to push or help in teamfights when needed.

My second Abilities Build for those maps :

When it comes to late game oriented maps, my strategy is different. I chose to upgrade the "Barbed Spines" spell as much as possible. This allows me to put pressure faster on my opponents and to easily pick up kills during teamfights or lane phase. The purpose of this build is to support my team as much as possible in teamfights, and to support the tank or the hero that is being focused by the ennemy team.