“for 5 seconds after channeling” part of these nodes I’ve picked aren’t giving any increase to my armour, elemental protection or movement speed after the channeling is complete. It only gives the buff during the channel, thou only the armour, health regen and 250 elemental protection. The 15% movement speed buff does not apply. At least it does not show under character sheet movement speed tooltip. During the channel and after it’s complete, the movement speed stays the same.
Also, think the math behind the armour increase might be a tiny vee bit wrong? Would help if someone else also tested this, but at the moment from my current 431 armour with two points in armour polish (which is 40%), increases to 12151. 431 + 40% = 12151, hmm.