RDM get much use out of mythic or is it extremely niche/novelty?
Niche imo. its very good, dont get me wrong... but i feel its kind of fallen to the wayside when compared to titans like the Crocea/naegling.
its still good for some things, but you'll never really want to melee in it, which makes it effectively a casting stat stick at best.
maybe it has some usage under R15 Afterglow & level 3 AM, but honestly having to use DB, and losing the +500% Enspell/+100% elemental damage from croc, or the Massive boosts from Naegling? i just cant see it.
i kind of feel all the RDM REMA need some love.
1. Excalibur, and even most relics, need a modernization overhaul. they need to have their weaponskills universally beefed up across the board to match the other REMA Skills in either damage or utility. i'd change excalibur's added light damage to proc on all hits, be based on 10% of your current HP, and be effected by Enspell damage + effects and skill. make it so that paladins can do some pretty good AE hits too. +3 Refresh / +30 HP is honestly kind of sad. maybe 10 refresh and 100 HP would make it worth while? IMO One of rdms biggest let downs is that it lacks regen 3 & 4.
2. Murguleis should ABSOLUTELY have the +Enspell damage exceeding what is available on the Crocea. the idea that an auction house weapon absolutely decimates EVERY SINGLE REMA available to the job....
3. Sequence doesnt hold a candle to Crocea or Naegling in any situation. i really wish sequence didnt suck so hard. imo its worse than Xcal/Burt for paladin, Worse than Tizona/almace for BLU, and worse than Crocea/Naegling for red.
4. Almace is still pretty strong if your doing CDC. we cant hold a candle to blu CDC spams due to their superior gear access, but we can definitely still get some usage from it. id like to see something that bought it a bit higher on utility scale.
TL/DR: Get the crocea, and the naegling as a back up with Daybreak/Thibiron offhand, and never look back. Nae is needed for situations where elemental damage isnt cutting it (like omen, or this months ambu). any other setting the AE Damage from crocea is going to absolutely decimate anything the nae is going to put up, and requires ZERO Buffs to do so.