@JusticeHeroXI personally would not want the scientist to be able to heal and fight at the same time (like the sun flower) . He's already a very offensive player, although not god tier like before
The scientist actually has a hard mechanic you need to work on to be elusive while staying aggressive. That is to aim at your opponents direction, jump, then LT/L2 right away, this should put your aim directly on the enemy, then fire. All of this should be done while your in the air.
This mechanic makes you really hard to hit. It's actually hard to aim too, but if you can master this then you will have a much easier time hitting your opponent than they are to hitting you.