I've been sitting on this TW/Ninjitsu build because I haven't had time to get into game lately but it's something that, thematically, makes me giggle: I have GIANT WEAPON but am AGILE NINJA. especially because shield defense is not useable with titan weapons. there isnt really another secondary for scrappers that offers as much offensive utility. bio has strong recovery, +damage, -resist, -regen, taunt aura. you will need to be aware of your clicky buttons and cycle through inspirations when playing solo or in a team with limited support buffs. it has more offense and it trades defense for that. just keep in mind that /bio is not perfect. if you are looking for something to enhance your offense i dont think you need to look any further than /bio. If you are just looking for a solid defensive secondary there are plenty of options (/energy, /nin, and /sr are reasonably easy to work with). so i wouldnt base your secondary solely on that aspect. just about any build can solve end problems with ageless anyways. BUT if you were willing to power through it all. you get to fire off a TON of abilities constantly.

Titan weapons is indeed end hungry, but that is mostly a consequence of how fast the animations are during momentum.

Titan arc dmg