Okay I like the idea of the floating spell focus AS a CLASS ABILITY.
I also like the idea of gaining the CLASS ABILITY to turn touch melee attacks into Ray Attacks. this class ability only should work with Ray Spells from any Arcane/Bard/Sorcerer spell lists.
At a certain level the Arcane Ray Master gains the ability to cast RAY SPELLS from another spell list other than his own. These spells can be Divine in nature but are cast as arcane spells. Furthermore the only spells that a Arcane Ray Master can select are spells that already are in RAY form, not melee touch spells.
When using the ability to turn touch spells into Ray spells the Ray Master casts the spell as a FULL ROUND ACTION.
The Floating Spell Focus Ability only applies to ORIGINAL ARCANE SPELLS not Divine Ray Spells. This focus gives a +1 to the Save DC to any Arcane spell of 4th level or lower. This Floating Focus is Stackable with Spell Focus and Greater Spell Focus. However if it will not stack with a Specialist Mage's DC from School Specialization.
At a level yet to be determined the Ray Master gets to cast the Ray of Frost or Ray of Fire (this is just a fire version of RayFrost) at will.
Also the cantrip now does 1d4 instead of 1d3 damage.
When the Ray Master casts a ray spell with the Split Ray Feat he rolls damage for 75% of the original total instead of 50% damage done to each opponent.
I think feats that the Ray master needs for requirements are Point Blank Shot, Weapon Focus Ray, Spell Casting Prodigy, and Spell Specialization Ray spells.
knowledge arcana 7 Ranks, spelcraft 7 ranks, Concentration 7 ranks.
At 1st level he gets the Split Ray Feat for Free.
at 3rd, 6th, 9th level he gets a metamagic feat or any feat that would benefit the casting of spells etc.... Combat Casting, extra spell, extra slot, etc...
Still need some help on this and with his spell progression I am thinking +1 spell casting class and a bonus ray spell every so many levels.