They can all have their uses. I would say keep them all if you have them as you never know what future aspects or abilities get introduced that synergise. However. Inmost + cyrtarachne is GOATED. It gives you the ultimate neutral gameplay. You run any aspects, fragments and always have high ability uptime + woven mail. Excellent in GMs etc. In low end content you might not see the value as much. Assasin + gyrfalcon is another good synergy. All hunter melee attacks apply debuffs. Stylish aspect will make you go invis and you get volatile rounds. This is a good one for low to mid content. You aint gonna get much joy out of it in master/GM content. The rest are niche. As i said though, keep anyway.