AX combat is a completely different style of combat compared to standard PVE combat, so it really doesn't make much sense that it has the same shared XP.
There should be two separate metrics. Firstly, there should be an 'Anti-Xeno' rank, which goes from Novice to Elite, just like the other ranks. Secondly, there should be decal rewards for killing each different type of thargoid, and each with roman numerals as you kill more, added automatically. So if you've killed 56 Cyclopses, you could put on a decal of a cyclops with LVI underneath it. If you've killed three Hydras, you can put a Hydra with III on it.
You should probably only get an additional tallymark if you are the only person with credit on the kill. Killing a hydra with 20 people is much easier, after all.
That way players have a reward for defending humanity, and encouragement to do it more!
There should be two separate metrics. Firstly, there should be an 'Anti-Xeno' rank, which goes from Novice to Elite, just like the other ranks. Secondly, there should be decal rewards for killing each different type of thargoid, and each with roman numerals as you kill more, added automatically. So if you've killed 56 Cyclopses, you could put on a decal of a cyclops with LVI underneath it. If you've killed three Hydras, you can put a Hydra with III on it.
You should probably only get an additional tallymark if you are the only person with credit on the kill. Killing a hydra with 20 people is much easier, after all.
That way players have a reward for defending humanity, and encouragement to do it more!