I will need 107k SP to maxed just selected skills from pacheon, fire and ice (without considering mastery level requirements

). Im 78 with 6 gap and I will keep masteries at 72 until the big update arrives and then:
1) I will put pacheon at 76 to get stun and KB (not maxing the skills),
2) mana shield to first level of 3rd book,
3) pacheon, fire and ice lvl7 passives
4) look if I still have SP to do anytihng else

,
5) continue grinding with 3 or 4 gap until I have enough SP

.