The thing is the humans already have a great endgame ship, its called the dunov. even vs a titan dunovs will be effective, assuming that EMP works on titans, that titans use antimatter, and have shields. If magnetize works on corvettes, then you have an anti corvette tactic as well, and then you have shield restore, to replenish all those wonderful shield points so you just won't die. the TEC become attrition machines, and if 3 dunovs aren't enough to stop a large fleet focus fire, build another. 4 dunovs with shield restore and max mitigation aught to really make your shields the strongest in the game, and make your losses negligable. oh, and look they even work well against subverters! omg!
kill an entire advent fleets shields in no time flat with 3-4 full powered emps, and you have a dead advent fleet.
do the same to vasari, and OMG the vasari with all their cheap abilities are done for. then the only thing you have to worry about is bombers, and magnetize works wonders for that.
VS TEC, the emp works well at destroying hoshikos, so that you gain the hoshiko superiority that in the long run will net you a victory.
Now advent do need some loving, and I for one think that they should have the strongest titan, perhaps it should be able to cast meteor. Or, it could have an ability that is the opposite of repulse. It would attract the enemy fleet to the titan, and if the titan is next to a starbase, the starbase would then meteor the enemy fleet, making advent starbases WAY more useful.
In that way you could have a large advantage, similar to what the vasari do when they build starbases in the enemy grav well. you get the enemy to come to you!
