How do I scale bladefall / blade blast?

I made a bow character this league and got her to 91. Have great mapping because you dont really need super high dps to map but on bosses t15+ esp with the extra life mod it just takes forever to kill them.

I've settled on blast rain out of all the skills for a trigger because of how focused the rain is and how it triggers basically like having firestorm as a coc trigger.

I've invested a ton into phys damage because BOTH skills do phys damage but my bladefall is still topping out at 12k and blade blast is only 8k. (That is while under the effect of arcane surge I'm getting from my self cast bladefall + unleash + spell cascade to instantly generate 50 blades for a huge minefield of explosions)The spells activation times are maxed based on the CD of CoC so I dont think I can get any more casts. I think I just need to make the ones that are going off do more dmg.

I have really fast attack speed and both spells on CoC so I always have blades and always have the blast. Using split arrow + pierce to curse everything in front of me with assassin mark and a diamond flask it looks really strong and wipes packs almost instantly.

Single target past t14 is kind of a joke though. Do I need to scale them with spell damage instead?

What's the best way to get some performance out of these 2?

Thanks!

with your current setup, you are effectively running both spells on a 3 link, which is not very ideal... I'd suggest ditching the bow playstyle, instead switch to either a single poet's pen or dual poet's pen to trigger bladefall, and run a 6L blade blast on chest with CoC Bladeblast. The trigger skill for the chest slot can be anything you want really, but barrage will be best for single target, and maybe even great to use for clear as well because how fast it will trigger bladefall in poet's pens. If you really want to keep the bow setup... Rolling a shaper bow with built-in cast on crit will help you get another link in, but that's still basically triggering 2 4Ls

Thanks for the response. I think I'll just hop on another character when I need boss dmg. I have a 1.5 mil tooltip char that craps on bosses.

The play style is so fun as this bow character though and mapping is really fast due to the run speed and dash + 2nd wind.

It's too bad they cant normalize damage and open up some creative options like this so it wouldn't then be OP in a 6 link. Maybe increase the damage CoC gives if its triggering more than one skill. Idk but thanks again!