First!
D.A.V.E. Rockets
This is the thing that should be the priority in your list. Nothing comes close to this upgrade. Melee just doesn't cut it anymore where monsters can now fly and attack with fireballs and shit. Go with D.A.V.E. rocket ability first. It gives your D.A.V.E.'s some range and it lets you attack air. Perfect for bunkers and main attacks with Fomor.
Second!
Eye-ra Airburst
From land high damage kamikazee monster to land hopping high damage kamikazee monster. It's absolutely a must if you want to kill flying monsters with your bunkers. And it's the only counter to Balthazars. Airburst, also increases splash range. It also gives you a chance to kill zafreetis when your enemy is attacking.
Third!
Fangs with Venom
Your leading edge in champ baiting. Send some Fangs with Venom and watch the enemy champ die. Gives you a handy tool to always use for the sake of champion baiting. It also saves you a lot of goo.
Others (Unlock in any order you like)
Bolt Teleportation
Gives your bolt the ability to teleport. Simply, More speed. It's not really a must. I mean come on, who uses bolts a lot after level 35?
Brain Invisibility
Invisibrains might have been a viable strategy in the past in taking down a base but times has change and 10m putty ain't cutting it after it got nerfed.
Project X Acid Spores
Gives your project X an eye-ra like finish when it dies. No way I'm using PXs after the 10m nerf. They're just too expensive and you should rather use inferno tower monsters for your tower wave when attacking.
Wormzer Splash Damage
Also a big facepalm after the putty nerf. Go play King Wormzer for some extra muscles. Although splash damage is a good thing. It's not waying out it's competitions who has almost the same abilities (i.e. Inferno Monsters). Although you can still use it, it's still better on just using D.A.V.E.s with rockets.
Bandito Whirlwind
Gives your Bandito the ability to attack monsters in all directions. It's some kind of splash damage. It's perfect for pokeys and octos but who puts pokeys in your bunkers to defend your yard?
Teratorn Ricochet
Gives a better punch with continuous attacking after a fireball is thrown. Although it's only viable if the enemy's ADTs are in a vulnerable spot. Not to mention an attack to a base with an army of teratorn will be extremely expensive. And the better option will always be using D.A.V.E. rockets.
Conclusion
Just to make it clear. I'm not telling you not to unlock the abilities but I'm giving you ideas on what to unlock first and what should be at the least of your concerns. Some things just makes sense and some things just works (D.A.V.E. Rockets). If you think something is missing here then don't hesitate and put a comment below.
