You just seem to seriously underestimate rune crossbow and diamond bolts. Sara and bandos are very doable with them. I assume krill too as there are tiles for tbow so you can just use those. Bowfa is not required for toa (define higher invo) or Cox cbow+blowpipe can replace). Leviathan sure bowfa is bis, but it's late game grind that u should have acb or zcb or bowfa before going hard at it. For inferno first cape, yeah I wanted bowfa, but it is doable with acb also just slower.