Progression question

[fossil fractal]

I've found myself in an odd place with gear. Kuradal has delt me a Greater Demon slayer task, and I'm not sure what to do with it. I do not yet have a hasta, and I only have 1 syanpse so far which I've used to craft a Scorching Bow. I've started doing TOA on invos up to and around 200, hoping for a lightbearer but haven't gotten anything except the thread just yet.

Do I sit on this Greater Demon task for an undeifned amount of time while I do TOA at around 200 invo until I get a Lightbearer, send Zammy attempts without a lightbearer using a ScoBow and Amethyst arrows, or just take my task and go to TD's for maybe more synapses?

Currently I've gotten to 200 invo TOA using a base keris partizan, but going higher it feels like i need something stronger. Sailing released with the new Belle's Folly, but I'm usure how efficient it would be to fish for a gryphon task, or which slayer master it would be bast to fish for it at.

Advice appreciated, as always. IGN is Doozi0 (that's a zero on the end) if you are curious of my stats.

[feral vault]

you can do zammy door-altar method without the lb.

[glass sentinel]

Yeah door altar is just fine, you also get to learn for bandos

[placid canyon]

As mentioned 6:0 Zammy door altar method. Also, assuming you have bowfa you should be doing 300s minimum for ToA grind (after getting hasta). I’d recommend knocking out bandos before ToA grind as well for BGS. If you don’t have bowfa, you should really get that before bandos or ToA grinds.

Also rune arrows are more than good enough with scobo at zammy, the time spent getting ama arrows there isn’t worth it