warp strike: good ability, the core of the demigod,cost and dmg are calibrated even if the last adding the crit could be too imba, resulting in a 3000 dmg in 7 second(hard to test it anyway)
warp area: weaker than thought, the immune part makes it good but jumping too much makes you lose the main target and basically its a aoe but weak since its not pbaoe, imo need some trick to make it a bit better, maybe if less than N targets are available the first AND the last will be on target resulting in 2x dmg on a single target, thats good imo
spine attack: its a very good cast, fast, good dmg and everything, the only problem is it makes the DG too much caster and mana dependant but otherwise it would be too much strong(maybe i will lower a bit both dmg and mana cost )
shadow swap: another core ability, i think its balanced or even could cost a bit more
elusiveness: hard to value, in the normal games autoattack is not an issue, but in high gold/long games could become useful, overall i would buff it a bit
demon speed:good skill and balanced
assassing speed: i would tune it down a bit
precision: its probably balanced thinking of some long games but overall i would tweak it a bit