Myrkr's only mod is Max MP, hence the MP+xx on Hvergelmir; 20% of max MP per 100tp is restored upon use. As such, you gear for max MP when using it. If you can boost your maximum MP in idle gear by 66%, a 300tp Myrkr will completely restore your MP pool; this is not as hard as it sounds, depending on what you idle in.
Whether or not it's worth carrying around a ton of MP+ gear solely as a WS set for Myrkr is another question entirely =p
Edited, Dec 22nd 2011 2:43pm by LyltiaofLakshmi
RDM can attain an almost static 50% reduction to recast time, SCH can over shoot this for a total of 60% reduction under Alacrity (provided you are wearing loafers and keeping dark weather on yourself)
MACC is a joke, any job with access to mage gear can hit close the MACC cap on legion mobs, which is why my BRD/RDM can land slow/para/blind despite having only 150 skill (from /RDM.)