Reaper Combos?

[Tomato]

Title says it all but any well experienced Reapers know some good combos for pve/pvp?

[Milithistorian]

Arsonist > Flame Locust Ex > filler > Flame Locust Ex> filler

[Bowwarrior]

Pretty much. It has the most damage for the lowest CD. 2k dmg at 6s. That used to be barrage's area at one time (~2k at 5s) but now that got nerfed. All other reaper skills have cd in the double digits, except for blade runner which still has a 1.9k damage at 8s, and burning escape at 6s. It's a solid 2k damage that can be chained to anything you do, clicks included.

For a damage/CD comparison with the Ex skills included, it's the strongest skills hands down with 1008.5 coefficient. The closest skills are barrage and pursuer with coefficients barely above and below 400 each. I'm not taking into account the arsonist 30% fire buff or anything else (arsonist' CD reduction for barrage is applied there since it should always be on), so it's only the skills themselves and their ex damages.

Keep in mind that the Ex part of Flame Locust is where the damage of the skill is (200% of the original 2k hit for a total of 3x the original or ~6k). With its 8s CD and a 11s debuff duration, you'll almost always have Blade Runner up in time for FL or its debuff available for any combos you use.

if you're going the iron applause/rain of death way and taking SP away from barrage, you'll use applause right after arsonist and before blade (or the other way around. Don't really remember) so you can maximize your DPS.

[Bowwarrior]

As for specific combos, it's whatever floats your boat, really. Reapers don't have that much of a problem with skill cd so we're pretty much constantly dishing out damage. And with our class mastery 2 we get an occasional extra skill for free. There's a video floating out here about double/triple casting some of those skills iirc.
i personally don't like using shinobi drop and pursuer right after the other because they both lock you in their animations while you could've used a skill in between (FL or barrage or mortal blow or burning escape), so there's that. Shinobi Drop works best if the target is airborne so use it right after skills that lift (locust, blade, chain chaser, etc).
With burst windows that last about 10s, your ult is golden if you can pull it off. Barrage, drop and pursuer's instant cast time with 5s CD lets you deal a lot of damage. If I'm not mistaken, the CM2 also applies during your ult, so more damage. Don't forget to cast blade runner and locust in there, or use your ult left clicks to reduce the CD if you run out of skills too quickly.