Here's the Python Source Code of my simulations if anyone is interested.

[hider=divinus.py]
"""
Simulates the levelling up in the RP Divinius,
assuming all Might is used for levelling or Holy Sites
"""

def simulate(holysite_saving):
    """holysite_saving: how many turns worth of might will be spent on
    Holy Sites. 0 means no Holy Sites constructed"""
    turn = 2
    level = 2
    might = 0  # the currency used to level up
    mpt = 5  # might per turn
    holy_sites = 0  # these produce might too
    build_cooldown = 0  # turns until next holy site
    while level < 100:
        might += mpt
        print("**Turn " +str(turn)+' start**')
        print('Level: '+str(level)+', Might: '+str(might)+', M/T: '+str(mpt)+', Holy Sites: '+str(holy_sites))
        cost = get_cost(level)
        levelled = False  #flag, for if any Might has been spent
        if build_cooldown < holysite_saving:
            # Save Might for a Holy Site, instead of levelling
            if build_cooldown == 0:
                # strategy: spend all might on Holy Sites when possible.
                mpt += might/2
                print('!! Built a Holy Site with '+str(might)+' Might')
                might = 0
                holy_sites += 1
                build_cooldown = get_cooldown(holy_sites)
                levelled = True
        else:
            # Level up as much as possible.
            while might >= cost:
                levelled = True
                might -= cost
                level += 1
                mpt += 1
                print('! Levelled up to Level '+str(level))
                cost = get_cost(level)
        if levelled:
            print('Level: '+str(level)+', Might: '+str(might)+', M/T: '+str(mpt)+', Holy Sites: '+str(holy_sites))
        turn += 1
        build_cooldown = max(0, build_cooldown-1)


def get_cost(level):
    """Returns the cost to level up from integer 'level'."""
    if level == 1:
        return 3
    elif level == 2:
        return 4
    elif level == 3:
        return 5
    elif level == 4:
        return 6
    elif level >= 5 and level < 10:
        return 10
    elif level >= 10 and level < 20:
        return 15
    elif level >= 20 and level < 50:
        return 20
    elif level >= 50 and level < 100:
        return 30
    else:
        return 100000

def get_cooldown(holysites):
    """Returns the turns it will take until you can build your next holy site,
    given the amount of holysites you already have at the moment of finishing
    building."""
    if holysites == 1 or holysites == 2:
        return 4
    elif holysites == 3:
        return 8
    elif holysites == 4:
        return 12
    elif holysites >= 5:
        return 100000
    else:
        return 0
[/hider]

[hider=divinus.py, for Ull'Yang]
"""
Simulates the levelling up in the RP Divinius,
assuming all Might is used for levelling or Holy Sites
"""

def simulate(holysite_saving):
    """holysite_saving: how many turns worth of might will be spent on
    Holy Sites. 0 means no Holy Sites constructed"""
    turn = 3
    level = 2
    might = 2  # the currency used to level up
    mpt = 7.5  # might per turn
    holy_sites = 0  # these produce might too
    build_cooldown = 0  # turns until next holy site
    while level < 100:
        might += mpt
        print("**Turn " +str(turn)+' start**')
        print('Level: '+str(level)+', Might: '+str(might)+', M/T: '+str(mpt)+', Holy Sites: '+str(holy_sites))
        cost = get_cost(level)
        levelled = False  #flag, for if any Might has been spent
        if build_cooldown < holysite_saving:
            # Save Might for a Holy Site, instead of levelling
            if build_cooldown == 0:
                # strategy: spend all might on Holy Sites when possible.
                mpt += might/2
                print('!! Built a Holy Site with '+str(might)+' Might')
                might = 0
                holy_sites += 1
                build_cooldown = get_cooldown(holy_sites)
                levelled = True
        else:
            # Level up as much as possible.
            while might >= cost:
                levelled = True
                might -= cost
                level += 1
                mpt += 1.5
                print('! Levelled up to Level '+str(level))
                cost = get_cost(level)
        if levelled:
            print('Level: '+str(level)+', Might: '+str(might)+', M/T: '+str(mpt)+', Holy Sites: '+str(holy_sites))
        turn += 1
        build_cooldown = max(0, build_cooldown-1)


def get_cost(level):
    """Returns the cost to level up from integer 'level'."""
    if level == 1:
        return 3
    elif level == 2:
        return 4
    elif level == 3:
        return 5
    elif level == 4:
        return 6
    elif level >= 5 and level < 10:
        return 10
    elif level >= 10 and level < 20:
        return 15
    elif level >= 20 and level < 50:
        return 20
    elif level >= 50 and level < 100:
        return 30
    else:
        return 100000

def get_cooldown(holysites):
    """Returns the turns it will take until you can build your next holy site,
    given the amount of holysites you already have at the moment of finishing
    building."""
    if holysites == 1 or holysites == 2:
        return 4
    elif holysites == 3:
        return 8
    elif holysites == 4:
        return 12
    elif holysites >= 5:
        return 100000
    else:
        return 0
    
[/hider]