1. spells.cpp

Find:

    if (player->getSummonCount() >= 2) {
       player->sendCancel("You cannot summon more creatures.");
       g_game.addMagicEffect(player->getPosition(), NM_ME_POFF);
       return false;
     }

Replace it with:

    if (player->getSummonCount() >= player->getMaxSummons()) {
       player->sendCancel("You cannot summon more creatures.");
       g_game.addMagicEffect(player->getPosition(), NM_ME_POFF);
       return false;
     }
---------------------------------------------------------------------------------

2. vocations.h

Find:

uint32_t getCapGain() const {
     return gainCap;
}

After it paste:

uint32_t getMaxSummons() const {
     return maxSummons;
}

Find:

uint32_t gainCap;

After it paste:

uint32_t maxSummons;
---------------------------------------------------------------------------------

3. vocations.cpp

Find:

          if (readXMLInteger(p, "gaincap", intVal)) {
             voc->gainCap = intVal;
           }

After it paste:

if(readXMLInteger(p, "maxsummons", intVal)) {
     voc->maxSummons = intVal;
}
Find:

gainCap = 5;

After it paste:

maxSummons = 2;
---------------------------------------------------------------------------------

4. player.h

Find:

    Vocation* getVocation() const {
       return vocation;
     }

After it paste:

uint32_t getMaxSummons() const {
     return vocation->getMaxSummons();
}