I have averaged the dps of the main 'tanks' at each tier (of all factions) and calculated the average survival time of several units per tier. I calculated the average survival time of the main tanks, the mobile anti-air units, and the engineers.
It does indeed show a significant drops in engineer survival time at higher tiers.
T1: Average tank dps = 25.5Heaviest Tank: 9.7 seconds
Anti-air: 7.2 seconds
Engineer: 5.3 seconds
T2: Average tank dps = 93.5Heavist Tank: 23.1 seconds
Anti-air: 10.7 seconds
Engineer: 2.9 seconds
T3: Average tank dps = 387.5Percival overkill on engineer is ignored, using Titan instead of Percival would result in average dps of 329 and 20% higher survival times)Heaviest Tank: 19.9 seconds
Anti-air: 5.3 seconds
Engineer: 1.4 seconds
Taking into consideration overkill, T1 engineers are in fact superior against single-target damage T3 units. Less buildpower is killed per second when T3 units attack T1 engineers than T3 engineers.
Buildpower killed per second
[b]T3: Average survival times, taking overkill into consideration
Harbringer: 300 damage every 0.8 seconds
Survival time*: 0.8 / 0.8 / 1.6
Buildpower per second killed: 6.3 / 15.6 / 25
Loyalist: 3 times 175 damage every 3.3 seconds, 1x 12 damage every 0.4 seconds
Survival time*: complicated
Buildpower per second killed: ~6.1 / ~7.8 / ~14.2
Brick: 150 damage every 0.4 seconds
Survival time*: 0.4 / 0.8 / 1.6
Buildpower per second killed: 12.5 / 15.6 / 25
Titan: 50 damage every 0.3 seconds
Survival time*: 0.9 / 1.8 / 3.3
Buildpower per second killed: 5.6 / 6.9 / 12.1
Percival: 1600 damage every 4 seconds
Survival time*: 4 / 4 / 4
Buildpower per second killed: 1.3 / 3.1 / 10
Othuum: 2x 75 damage every 0.5 seconds, 1x 400 damage every 4 seconds
Survival time*: complicated
Buildpower per second killed: 6.3 / 9.4 / 15
*I ignored alpha strike
INCREASING ENGINEER HPIf we would take the survival time relation of T1 Anti-Air and T1 Engineer and say that relation should be used for T2 and T3 engineers, then the average survival time of an engineer would be 74% of the survival time of anti-air.
This would result in the following hitpoint values:
New engineer hp values and survival time
T1 engineer (for reference)
Average hp: 135
Average survival time: 5.3 seconds
T2 engineer
Current average hp: 270
Current average survival time: 2.9 seconds
New average hp: 740
New average survival time: 7.9 seconds
T3 engineer
Current average hp: 530
Current average survival time: 1.4 seconds
New average hp: 1516
New average survival time: 4.6 seconds