Interceptor passive recharges shield the faster you move. Survivability is all in mobility.

Standard rotation: prime->jump triple dash->jump melee->chain melee->tempest melee-> jump triple dash away->fly/reset->repeat or rotate into gun (devastator) dps. Shuffle and open with devastator for shielded mobs.

I was carrying two devastators on my interceptor in hard mode, as it was the most efficient long range delete button...meaty boss dps with target beacon and devastator too, hitting 15k on crit spots. Plus just 2 ez just chain meleeing the ads in between boss phases.. I also grinded the stronghold hard on all javelins and thought interceptor/storm were for sure the easiest and I can see others in this sub agree..

So if your thinking inty is underpowered I'm not gonna say get good but I'm gonna go ahead and say you didn't play enough to support your claim.