Things I learned so far that might help

1.) If you see one of the enemy's guardian hearts blinking, it means that a wound will be landed as soon as your guardian lands on theirs.
This means you can ignore attacking the guardian and focus on taking a enemy creature down.
However, if your team is the one gettting rampaged, and one of your hearts are blinking, you must get to 100 power before the enemy guardian lands, or suffer the wound.

2.) Jumping obsessively will drain your stamina like no other. It's best to keep your feet on the ground unless you're doging incoming damage.

3.) You can heal by standing next to ANY of your creatures, as long as there are no enemies nearby. They outline this in the tutorial, but i've seen too many people not taking advantage of this.

4.)Don't be afraid to back out of a winning fight (or a loosing one) if you are too close to death.
if you die, thats power to the enemy team, and you don't need them a step closer to rampaging.

5.)Stick as a team! This is a team game and team fights are the bread and butter.
Seperating isnt a good idea, however, occasionally a team will completely ignore summoning on their side of the map, and then there will be nothing to collect the power orb. This is a great time to sneak behind and grab it unnotticed. I do it more than i'd like to admit. Free 20 power!

6.)It seems players on the rampaging side like to kill creatures before their guardian lands for some reason. You don't get power from it and it becomes a mild (very mild) inconveinence for the enemy. Try to kill it after the wound or if you need more time to land the wound. However, you do get experience from the kill, which should help with leveling, and under certian circumstances, can give you an advantage. -Thx Doritoman :V

7.)No matter how low the enemy guardian's health is, the last wound cannot be dealt by your guardian alone, which means the last wound must be dealt by your team.

8.)Players caught by Xenobias ult cannot take damage from any other source except the ult. If the enemy has a purple glow around them with tenticles, be sure to save your abilites for others who arent affected by the ult. -thx Arryu B)

9.) LEVEL ADVANTAGE/DISADVANTAGE. If the enemy team is steamrolling you, you will notice that they will not only have a wound/power advantage, but also a level advantage. They will be stronger and meaner than you, so at this point, you will have to work as a team to land kills and get your levels up to counter this. Otherwise, when you start to enter the clash, both teams should be max level. From there, its an (almost) equal battle. -Thx Mayor Mccheese :O

• Go all in when you get a team wipe
  
• If you are in the lead for power (not wounds), play defensively. Creatures should get power for you
  
• That being said, if you are behind, go agressive and get those kills
  
• Its probably better not to sacrifice yourself to gain a kill, unless you're near rampage
  
• Fire drake sucks right now
  
• So does the storm drake
  
• If you see a enemy power orb avaliable to collect, steal that shizz bruh!
  
• Not attacking even in battle will regen your stamina
  
• Always have as many fortune cards as possible! Free rewards!
  
• Don't be afraid to use your lvl 1 focus to secure a kill if your are really close to getting the ramage
  
• Use the middle mouse button to use pings! Those are important.

1.) Are you confident in landing your shots, and are comfortable in staying in one place for a long time? Take On the mark.
2.)Are you not confident, perfer to quickshot, and are constantly moving? Take Snapshot. 1.)You are pretty much the only character that can effectively shoot from above at any place at anytime (as long as your boosters aren't on cooldown.)
You'd be suprised at how many people dont look up.
2.)That being said, its also great for escapes. 1.) Your Arcane Vortex is a major counter to any ranged hero.
2.)If you get the skill Reverse Polarity, it reflects the projectiles back at them, and most people keep hurting themselves without even knowing it.
3.)If your guardian is pinned, place your Vortex on the weakpoint.

Zandoria

1.)You are one big buff machine. Don't forget that.
2.)Use your Aura of life to cleanse everyone of debuffs rather than healing, its much more useful that way.

Aisling

1.) You have two ways of building yourself.
2.) A lean, mean, fighting machine. (Tanky)
3.) a small, kind child. (Support)

Uncle Sven

1.)CHUCK THOSE BOMBS ♥♥♥♥♥♥♥
2.) Your Elastic ooze is your only means of escape, and even then all it does is send you up. Stay near the back.
3.) That being said, since you fly straight up, stay near places where you can escape to high ground quickly to avoid potential killers! -Thx Celtic Beast! :J

Well thanks for reading this much. I played a bit of the beta, but im not a pro. I will add to this as soon as I learn more, and if you have any tips you want me to put on here, lemme know.

ALSO. If you have any photos you want to share to help better explain some of the points listed above (like Xenobias ult) feel free to leave a link and i'll add it here.

Glhf!